Resistor PDF

Ques 1: The _____________ of a resistor is determined generally by its physical size. 1. Resistance 2. Current 3. Power 4. a & b are correct Click here for the answer Ans: The correct option is (2) Current. Explanation: Every resistor possesses a maximum power rating which is...

Ques 1: The _____________ of a resistor is determined generally by its physical size. 1. Resistance 2. Current 3. Power 4. a & b are correct Click here for the answer Ans: The correct option is (2) Current. Explanation: Every resistor possesses a maximum power rating which is determined by its physical size generally, and the greater its surface area the more power it can dissipate safely into the ambient air or into a heatsink. As long as its “Dissipating Power Rating” is not exceeded by the resistor power rating, a resistor can be used at any combination of voltage (within reason) and current, indicating how much power the resistor can convert into heat or absorb without any damage to itself. Ques 2: The two main characteristics of a resistor are _______________________. 1. Resistance and Power 2. Current and Power 3. Current and Voltage 4. Resistance and Current Click here for the answer Ans: The correct answer is (1) Resistance and Power. Explanation: The two main characteristics of a resistor are its resistance, R, in ohms, and its power rating, P, in Watts. The resistance provides the desired drop in voltage or the required reduction in current. The wattage rating determines the amount of power the resistor can safely dissipate as heat. The wattage rating, as a safety factor, is always more than the actual amount of power dissipated by the resistor. Ques 3: Resistor is an _________________ component or device. 1. Active 2. Passive Click here for the answer Ans: The correct answer is (2) Passive. Explanation: The resistor is a passive component as it opposes the flow of electrical current through it. Resistors don't need an external power source to function. They use some other property to control the electrical signal. As a result, they only require the current to travel through the connected circuit. Ques 4: Mainly resistors are available in the maximum value of ______________ohm.  1. Kilo (K Ω) 2. Giga (G Ω) 3. Mega (M Ω) 4. Tera (T Ω) Click here for the answer Ans: The correct option is (3) Mega. Explanation: The resistive value of a resistor, and its ability to limit current flow is measured in Ohm's ( Ω ) that range from less than one Ohm each to many millions of Ohm's, (Mega-Ohm's). Resistors can be of a fixed value, for example, 100 Ohms, (100Ω) or variable as in 0 to 100Ω. Ques 5: Ohm’s law is true for: 1. Metallic conductors at low temperature 2. Metallic conductors at high temperature 3. For diode when current flows 4. For electrolytes, when current passes through them Click here for the answer Ans: The correct answer is: (1) Metallic conductors at low temperature Explanation: According to Ohm’s law, in metallic conductors at constant temperature and zero magnetic fields, the current flowing is proportional to the voltage across the ends of the conductor, and is inversely proportional to the conductor's resistance. Check also: NCERT Solutions Chapter 3 Current Electricity Ques 6: The power rating of a resistor has to be ____________ than from actual power dissipation as heat for the reason of the Safety factor (Burning). 1. Less 2. More Click here for the answer Ans: The correct answer is (2) more. Explanation: A resistor can be used at any combination of voltage (within reason) and current so long as its “Dissipating Power Rating” is not exceeded, and with the resistor power rating indicating how much power the resistor can convert into heat or absorb without any damage to itself. Ques 7: What among the options is the Power Dissipation formulae? 1. P = V×I 2. P = V^2 / R 3. P = I^2 × R  4. All are correct Click here for the answer Ans: The correct option is (4). Explanation: All these are the formulas of power. But in one of the formulas, P is directly proportional to R, and in other, it is inversely proportional to R. V^2/R is used when the potential in the circuit is the same. i.e. if the two resistance are connected parallel then we will use V^2/R to calculate the power. Similarly, if resistances are connected in series then the current will be constant in the circuit. Then, we will use the I^2R formula to calculate power. If we know the current and potential then VI is used to find out the power. Ques 8: Most common type of Resistor is _________________________? 1. Film Type Resistor 2. Carbon Resistor 3. Wire Wound Resistor 4. Fusible Resistor Click here for the answer Ans: The correct answer is (2) Carbon Resistor. Explanation: Carbon resistor types are very cheap to make which is why commonly used in electrical circuits. However, due to their manufacturing process carbon-type resistors have very large tolerances so for more precision and high-value resistances, film-type resistors are used instead. Ques 9: Resistors are ________________ devices. 1. Polarity Devices 2. Non-Polarity Click here for the answer Ans: The correct answer is (2) Non-Polarity. Explanation: The resistance does not have polarity because it opposes the flow of electrons. The flow of electrons is from the lower potential to the higher potential. However, if the resistor is not intrinsic, if or has impurities changing its resistance throughout the length then there occurs a difference in the V-I characteristics of the resistor. Ques 10: An example of non-ohmic resistance is: 1. Tungsten wire 2. Diode 3. Carbon resistance 4. Copper wire Click here for the answer Ans: The correct answer is (2) Diode. Explanation: A non-ohmic resistance is a resistance that does not follow Ohm’s law. Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. And the diode is non-ohmic. Check also: Combination of Resistors-Series and Parallel Ques 11: What happens with the requirement of Power rating when the resistance increases? 1. Lower Power Rating 2. Higher Power Rating Click here for the answer Ans: The correct answer is (1) Explanation: Resistors oppose the current so they will dissipate some power. According to this equation, V2/R = P = I2⋅R, power is inversely proportional to resistance on the left side and directly proportional to resistance on the right side. So power rating is important in such a way that dissipated power should be lower than the power rating of the resistor. Ques 12: The Resistance of a Carbon Composition Resistor depends on______________. 1. Size 2. Current 3. The ratio of Powders (Carbon & Ceramic) 4. a & b are correct Click here for the answer Ans: The correct answer is (3) Explanation: The resistance of the carbon composition resistor depends on the amount of carbon added, the length of the solid cylindrical rod, and cross sectional area of the solid cylindrical rod. Ques 13: Power Rating is ___________________ proportional to the Resistance ® of a Resistor: 1. Directly 2. In-Directly Click here for the answer Ans: The correct option is (2) Indirectly. Explanation: As R = L/A, therefore Resistance is Indirectly proportional to the surface area. In the case of the resistor as power rating increases, the size also increases in order to facilitate higher area for power dissipation. Ques 14: Wire Wound Resistors are usually used (Applications) for _________________________. 1. High Current 2. Low Resistance  3. Desired (Appreciable) Power 4. All are Correct Click here for the answer Ans: The correct answer is (4) Explanation: Wire wound resistors are often used in circuit breakers or as fuses. In order to make a fusible resistor, the manufacturer attaches a small spring to one end of the resistor. Due to their high power capabilities, wire wound resistors are common in circuit breaker applications. They may be used as components in a large circuit breaker device or may act as circuit breakers themselves. Ques 15: Wire Wound Resistor is only used for _________________________. 1. Low Frequency 2. High Frequency Click here for the answer Ans: The correct answer is (1) Low Frequency. Explanation: Wire wound resistors are very good for low frequency as well as DC operation, however, the effects of inductance and capacitance become more noticeable as the frequency of operation rises. The inductance arises from the fact that the resistor is effectively a coil of resistance wire and is affecting an inductor. Ques 16: At High Frequency, Wire Wound Resistor Acts As _________________________. 1. Capacitor 2. Inductor 3. Diode 4. a & b are correct Click here for the answer Ans: The correct answer is (2) Inductor. Explanation: The wire-wound resistance comprises various turns around it. If there is a number of turns in the element then it acts as an inductor. But due to less number of turns very small inductive property exhibited in the wire-wound resistance. 1. In series connection of resistors, what happens to the current across each resistor? a) Increases b) Decreases c) Remain the same d) Initially increases and then decreases View Answer Answer: c Explanation: When the resistors are connected in series, and current is passed through them, the current passing through each of the resistor is the same. This is because, the resistors are connected end to the end and, therefore, there is only one path for the current to flow through. 2. What is the equivalent resistance of series combination of 3 resistors? a) Rs = R1 + R2 + R3 b) Rs = 1(R1+R2+R3) c) Rs = 1R1+1R2+1R3 d) Rs = (R1+R2)R3 View Answer Answer: a Explanation: When three resistors are connected in series, then the equivalent resistance of this combination is Rs = R1 + R2 + R3. So, if 3 resistors having resistances 10, 15, and 20 ohms, are connected in series, then equivalent resistance of this combination is Rs = 10+15+20 = 45 ohms. 3. Identify the combination which is not a series connection. a) Resistance box b) Decorative bulbs c) Fuses d) Domestic appliances View Answer Answer: d Explanation: Domestic appliances in a house are connected in parallel combinations, and not in series combinations. This arrangement is done so that each of the appliances can switched on and off independently, which is essential in a house’s wiring. advertisement 4. The equivalent overall resistance is smaller than the smallest parallel resistor. a) True b) False View Answer Answer: a Explanation: Yes, the equivalent overall resistance is smaller than the smallest resistor connected in parallel. This is because, the overall equivalent resistance of parallel combination is: Rp = 1R1+1R2+1R3. When the inverse of a resistance value is taken, the value obtained is lesser than the original value. Thus, the sum of inverse values will only provide a lesser value than the initial resistances. 5. Pick out the correct statement from the following about parallel combination of resistors. a) The current across the resistors are the same b) The resistance offered by all resistors are the same c) The potential difference is same across each resistor d) The equivalent overall resistance is larger than the largest resistor View Answer Answer: c Explanation: In parallel combination, the resistors are connected together at one end, and are also all connected together at the other end. So, the potential difference across the resistors will not change and thus, remains the same. Sanfoundry Certification Contest of the Month is Live. 100+ Subjects. Participate Now! 6. Calculate resultant resistance between the points A and B in the circuit shown in the figure below. a) 4 ohms b) 2 ohms c) 8 ohms d) 6 ohms View Answer Answer: b Explanation: We can simplify the given diagram as follows: According to the diagram shown above, 1R1=14+18=4+64×6=1024 → R1 = 2410 = 2.4 1R2=12+18=2+82×8=1016 → R2 = 1610= 1.6 Now, R1 and R2 are in series, so, Rs = 2.4 + 1.6 = 4.0. 8 ohms, Rs, and the bottom 8 ohms are in parallel, so, Rp = 18+14+18=12. Then, when you take the inverse, you will get the equivalent resistance of the given combination, i.e., 1Rp=112 = 2 ohms. 7. Two wires of the same material have the same length but their radii are in the ratio of 5:3. They are combined in series, where the resistance of the thicker wire is 12 ohms. Calculate the total resistance of the combination. a) 40 b) 12 c) 32 d) 20 View Answer Answer: c Explanation: The given ratio of radii = 5:3; R2R1=53 → R2 = (53) R1 R1 = 12 ohms (given); R2 = (53) × 12 = 20 ohms. So, R1 = 12 ohms and R2 = 20 ohms Therefore, total resistance (R) = R1 + R2 (since they are combined in series) = 12 + 20 = 32 ohms Thus, the total resistance of the combination is 32 ohms. 8. Three resistors each of 5 ohms are connected in the form of a triangle. What is the resistance between the vertices? a) 310 b) 103 c) 1550 d) 25 View Answer Answer: b Explanation: Equivalent resistance = 5 + 5 + 15 (since first two are in series, and they are in parallel to the third in case of a triangular arrangement) 1R = 10 + 15=(5+10)5×10=1550=310 Thus, R = 1310=103 ohms Therefore, the equivalent resistance is 103 ohms. 9. Two resistors are connected in parallel, whose resistance values are in the ratio 3:1. Find the ratio of power dissipated. a) 1:3 b) 3:1 c) 1:2 d) 2:1 View Answer Answer: a Explanation: We can consider the relation that includes power and resistance, i.e. Power = voltage2resistance. Since, the resistors are connected in parallel, the voltage across them will be the same. From this relation, power and resistance are inversely proportional to each other. Thus, P1P2=R2R1=13 So, the power dissipated is in the ratio is 1:3. 10. A set up is such that there are three similar resistors, each of 20 ohms resistance. Two of them are connected in parallel, and this combination is connected in series with the third one. The maximum power that can be consumed by each resistor is 30 W. Then, what is the maximum power that can be consumed by the combination of all three resistors? a) 30 b) 20 c) 35 d) 45 View Answer Answer: d Explanation: The equivalent overall resistance of the parallel combination is: 1R1=120+120=220=110 → R1 = 10 ohms. R1 is in series with R2; So, R3 = R1 + R2 = 10 + 20 = 30 ohms. Now, we can employ the method of cross-multiplication: For 20 ohms resistor → 30 W power consumed For 30 ohms resistor combination → x 20x = 30 × 30 x = 30×3020 x = 45 Therefore, the power consumed by the parallel combination is 45 ohms. Resistor Color Codes MCQs Q.1. Resistor Color codes were developed by: A. Radio Manufacturers Association (RMA) B. International Organization for Standardization (ISO) C. Electronics Industries Alliance (EIA) D. a & b are correct Click here for the answer A.1. The correct option is A. Radio Manufacturers Association (RMA) Explanation: The resistor color code was invented by the Radio Manufacturers Association (RMA) in the 1920s. Q.2. Why is Color Coding used for Resistors? A. Cylindrical Shape B. Small Size C. Due to Through Hole Component D. A & B are correct Click here for the answer A.2. The correct option is D. A & B are correct Explanation: Electronic components and wires are given color coding to identify their value and function. The color bands help in identifying Components and wires are coded with colors to identify their value and function. These help in identifying resistor resistive values, tolerance percentage, and resistor size indicative of its power rating. Q.3. The number of color bands used in resistors is _______. A. 7 B. 6 C. 5  D. 4 Click here for the answer A.3. The correct option is B. 6 Explanation: Resistors have color bands divided into three types: 4 band resistor, 5 band resistor, and 6 band resistor. Q.4. Red color bands on resistors are read from________. A. Left to Right B. From both sides C. Right to Left D. All are correct Click here for the answer A.4. The correct option is A. Left to Right Explanation: Resistors do not start with a metallic band on the left. Hence if a resistor has a gold or silver band on one end, there is a resistor tolerance of 5% or 10%. The resistor position on this band is read from left to right. Read More: Important Topics from Current Electricity Ohm’s Law Cells in Series & Parallel Electrical Circuit Static Electricity Carbon Resistor Kirchoff's Laws Cells, EMF & Resistance Ohm’s Law & its Limitations Voltage Divider Formula Network Analysis Internal Resistance Power and Resistance Q.5. What are the first two bands on the resistors? A. Tolerance B. Decimal Multiplier C. Two digits D. All are incorrect Click here for the answer A.5. The correct option is C. Two digits Explanation: The first two bands on a resistor are two digits that denote the resistance value in Ohms. In a 3-band or 4-band resistor, the third band is representative of the multiplier. Q.6. The digit that represents the green band on a resistor is ________. A. 3 B. 4 C. 5 D. 6 Click here for the answer A.6. The correct option is C. 5 Explanation: From the resistor color code table, green is represented by the digit 5. Q.7. _______ is to be added after the first two digits in a decimal multiplier? A. Resistance B. Digits C. Tolerance D. Zeros Click here for the answer A.7. The correct option is D. Zeros Explanation: The first two digits are representative of the resistance values and after that, zeroes are added to the decimal multiplier as given in the resistor code. Q.8. Zero Ohm resistors are used for __________. A. Connect the Tracks B. As Jumpers C. Increase Machine Production Time D. All are correct Click here for the answer A.8. The correct option is D. All are correct Explanation: Zero Ohm resistors are most conveniently used as jumpers, connected with tracks, and also useful in increasing the machine production time. Also Check Out: Other Related Articles Electric Charge Wheatstone Bridge Galvanometer Current Ammeter Vs Voltmeter Resistivity and Temperature Resistance & Length Power Transformers Q.9. A no band on the resistor means the tolerance is __________. A. 0.3% B. 15% C. 30% D. 20% Click here for the answer A.9. The correct option is D. 20% Explanation: Tolerance is defined as the percentage error in resistance of the resistor. Thus, a gold tolerance band has a tolerance of 5%, silver has a tolerance of 10% and when there is no band, the tolerance is 20%. Q.10. The color coding indicates the _______ value or rating of the resistor. A. Numerical B. Resistance C. Alphabetical D. a & c are correct Click here for the answer A.10. The correct option is A. Numerical Explanation: Color codes help in identifying the value and function of the electronic components and wires. They also help in identifying the resistive value, percentage tolerance, and wattage rating based on the resistor size. Q.11. 7 digit is represented by ________ in the resistor color code. A. Blue B. Violet C. Green D. Red Click here for the answer A.11. The correct option is B. Violet Explanation: As per the resistor color code, the 7 digit stands for Violet. Resistor Color Codes MCQs Q.1. Resistor Color codes were developed by:  A. Radio Manufacturers Association (RMA) B. International Organization for Standardization (ISO) C. Electronics Industries Alliance (EIA) D. a & b are correct Click here for the answer A.1. The correct option is A. Radio Manufacturers Association (RMA) Explanation: The resistor color code was invented by the Radio Manufacturers Association (RMA) in the 1920s. Q.2. Why is Color Coding used for Resistors? A. Cylindrical Shape B. Small Size C. Due to Through Hole Component D. A & B are correct Click here for the answer A.2. The correct option is D. A & B are correct Explanation: Electronic components and wires are given color coding to identify their value and function. The color bands help in identifying Components and wires are coded with colors to identify their value and function. These help in identifying resistor resistive values, tolerance percentage, and resistor size indicative of its power rating. Q.3. The number of color bands used in resistors is _______. A. 7 B. 6 C. 5 D. 4 Click here for the answer A.3. The correct option is B. 6 Explanation: Resistors have color bands divided into three types: 4 band resistor, 5 band resistor, and 6 band resistor. Q.4. Red color bands on resistors are read from________. A. Left to Right B. From both sides C. Right to Left D. All are correct Click here for the answer A.4. The correct option is A. Left to Right Explanation: Resistors do not start with a metallic band on the left. Hence if a resistor has a gold or silver band on one end, there is a resistor tolerance of 5% or 10%. The resistor position on this band is read from left to right. Read More: Important Topics from Current Electricity Ohm’s Law Cells in Series & Parallel Electrical Circuit Static Electricity Carbon Resistor Kirchoff's Laws Cells, EMF & Resistance Ohm’s Law & its Limitations Voltage Divider Formula Network Analysis Internal Resistance Power and Resistance Q.5. What are the first two bands on the resistors? A. Tolerance B. Decimal Multiplier C. Two digits D. All are incorrect Click here for the answer A.5. The correct option is C. Two digits Explanation: The first two bands on a resistor are two digits that denote the resistance value in Ohms. In a 3-band or 4-band resistor, the third band is representative of the multiplier. Q.6. The digit that represents the green band on a resistor is ________. A. 3 B. 4 C. 5 D. 6 Click here for the answer A.6. The correct option is C. 5 Explanation: From the resistor color code table, green is represented by the digit 5. Q.7. _______ is to be added after the first two digits in a decimal multiplier?  A. Resistance B. Digits C. Tolerance D. Zeros Click here for the answer A.7. The correct option is D. Zeros Explanation: The first two digits are representative of the resistance values and after that, zeroes are added to the decimal multiplier as given in the resistor code. Q.8. Zero Ohm resistors are used for __________. A. Connect the Tracks B. As Jumpers C. Increase Machine Production Time D. All are correct Click here for the answer A.8. The correct option is D. All are correct Explanation: Zero Ohm resistors are most conveniently used as jumpers, connected with tracks, and also useful in increasing the machine production time. Also Check Out: Other Related Articles Electric Charge Wheatstone Bridge Galvanometer Current Ammeter Vs Voltmeter Resistivity and Temperature Resistance & Length Power Transformers Q.9. A no band on the resistor means the tolerance is __________. A. 0.3% B. 15% C. 30% D. 20% Click here for the answer A.9. The correct option is D. 20% Explanation: Tolerance is defined as the percentage error in resistance of the resistor. Thus, a gold tolerance band has a tolerance of 5%, silver has a tolerance of 10% and when there is no band, the tolerance is 20%. Q.10. The color coding indicates the _______ value or rating of the resistor. A. Numerical B. Resistance C. Alphabetical D. a & c are correct Click here for the answer A.10. The correct option is A. Numerical Explanation: Color codes help in identifying the value and function of the electronic components and wires. They also help in identifying the resistive value, percentage tolerance, and wattage rating based on the resistor size. Q.11. 7 digit is represented by ________ in the resistor color code. A. Blue B. Violet C. Green D. Red Click here for the answer A.11. The correct option is B. Violet Explanation: As per the resistor color code, the 7 digit stands for Violet. 1. Which of the following statement specifies Ohms Law? V = I/R R = VI V = I*R I = V/R Hint 2). The unit of voltage is...? Watt Coulomb Ampere Volt Hint 3). The unit of current is...? Ampere Volt Coulomb Watt Hint 4). The unit of power is...? Coulomb Ampere Volt Watt Hint 5). The unit of resistance is...? Watt Ohms Ampere Volt Hint 6). The Ohm’s law obeys components are known as: Ohmic components Non-ohmic components Resistors None of these Hint 7). Which of the following V-I curve is belongs to Ohmic components Straight line V-I curve Non-linear V-I curve Parabolic VI curve Sinusoidal VI curve Hint 8). Many resistors in a circuit, the resistance is... Resistance is low Resistance is high Resistance is same Resistance may change Hint 9). Resistors that contain set resistance is known as Variable resistors Thermistors Fixed resistors Fixators Hint 10). The silver stripe tolerance is ± 5% ± 10% +5% + 10% Hint 11). Which of this can have positive otherwise negative charge Hole Iron Neutron Electron Hint 12). Electric current has an only lane throughout circuit in Combination of Random Combination of Series Combination of Parallel Combination of Circular Hint 13). The flow of electric current in a circuit is because of the following. Ions Atoms Electrons Charged particles Hint 14). The copper resistivity is 12.9 omega.gif 10.7 omega.gif 16.6 omega.gif 19.0 omega.gif Hint 15). How do fixed resistors generally not pass? Gradually over time By raising their value By becoming an open circuit By rising their value & becoming an open circuit Hint 16). By Ohm's law, if voltage raises & resistance resides the same: Current increases Current residue the similar Decreases Power Decreases Resistance Hint 17). Which of the following formula illustrates a straight proportionality among power & voltage? P = VI V = IR I = V/R P = IR Hint 18). Which of the following type resistor is found within SIPs & DIPs? Thick film Wire wound Metal oxide Metal film Hint 19). Which of the following two main categories of resistor? Permanent & changeable Low ohmic as well as high ohmic value Commercial as well as Industrial Low power and high power value Hint 20). How many of the potentiometer can have the following connections? 1 3 5 7 Hint 21). The Power can be defined as Energy The charge at which energy is utilized Watts The charge at which energy is produced Hint 22). Which of the following conductor is most frequent in electronics? Aluminum Gold Silver Copper Hint 23). By using Ohm's law, the resistance is not changing means that voltage as well as current is Directly proportional The same Not capable to generate energy Inversely proportional Hint 24). Which of the following ohmic value resistor has a color code of orange, orange, orange? 26 kilohms 33000 ohms 2200 ohms 33 kilohms Hint 25). The power can be calculated in units of...? Joules * charge Joules per work Joules per time Joules * voltage Hint Resistors Question & Answers for Interview 26). Which of the following step is most important while calculating resistors? Utilize the maximum potential scale Keep test terminals short keep the meter reading zero before using Take away power from the circuit Hint 27). Which of the following component can be designed for opposing the flow of current is named as? Insulators Resistors Conductors Heat exchangers Hint 28). What kind of resistors have a 5% of tolerance rating otherwise better? General-purpose SIP Precision Wire wound Hint 29). The tolerance of Resistor can be either printed on top of the component, otherwise can be provided by Keyed containers Color code Size Ohmmeter reading Hint 30). When the load resistance rises, then what will be the load current? Vary Decrease Increase Remain Constant Hint 31). Which of the following test apparatus is used for calculating resistance? Voltmeter Ammeter Ohmmeter Wattmeter Hint 32). Whenever resistance reduces then what will be the current? Increase Remain the same Decrease Double Hint 33). Which of the following property will have a good fuse A medium resistance An infinite resistance Zero ohms resistance A high resistance Hint 34). Which of the following property will have the wire wound resistor Low power High power High current Negative temperature coefficients Hint 35). How the power dissipation can be done in a resistor? By Resistance By heat By current By voltage Hint 36). If more resistors are connected in a circuit then what will be the resistance? Less Vary Constant High Hint 37). A component in an electric circuit used to restrict the flow of current is known as Transistor Integrated circuit MOSFET Resistor Hint 38). The power of resistor can be determined through…….? Physical size Color code Resistance None of the above Hint 39). Which of the following are resistor characteristics Current & power Current & voltage Resistance & current Resistance & power Hint 40). The maximum available value of a resistor is Kilo Ohm Mega Ohm Gega Ohm Tera Ohm Hint 41). Which of the following resistor is most commonly used? Film type Wire wound Carbon type Fusible Hint 42). Wire wound type resistor works at high frequency like…? Diode Capacitor Transistor Inductor Hint 43). Carbon composition resistor is mostly used because of…? High inductance Small in size Inexpensive Less weight Hint 44). Which of the following equation is correct for resistors in parallel connection? R= R1xR2XR3X…XRn R= R1+R2+R3+…+Rn 1/R= 1/R1+1/R2+1/R3+…+1/Rn 1/R= R1+R2+R3+…+Rn Hint 45). In series connection of resistors, the amount of current across every resistor is... Different Similar Changes based on resistance value Stable Hint 46). Which of the following factor is used to determine the resistance of a material Resistance Inductance Temperature Type of supply Hint 47). The conductor’s resistance is proportional to….? Length Current Area Temperature Hint 48). When the VDR or varistor simply conducts? Current supply within the circuits increases a fixed value When current supply decreases in the circuit When voltage supply increases a fixed limit When power rating increases Hint 49). The wire’s resistivity mainly depends on the…? Material of wire Area Length Temperature Hint 50). Which of the following range is suitable for carbon resistor? 1 to 35 Ω 1 to 30 KΩ 1 to 22 MΩ 1 to 10 µΩ Hint MCQs on Resistors for Exams 51). SMD resistors are mainly used because of….. Small in size Rugged Affordable None of these Hint 52). Which of the following tolerance is used for carbon resistor? 5% 10% 15% 30% Hint 53). Which of the following material is used to made cerment resistor? Liquid alloy Chemical alloy Metal alloy None of the above Hint 54). Which of the following resistor is used in DIPS & SIPs? Thick film Carbon film Wirewound Variable Hint 55). Which of the following resistor is varistor? SDR PDR BDR VDR Hint 56). What is the function of a photo resistor/LDR? Detects light Detects current Detects temperature Detects moisture Hint 57). Which of the following resistor have good stability? Carbon film resistor Variable resistor Light dependent resistor Carbon resistor Hint 58). Which of the following resistor changes its value when applied voltage varies? Variable resistor Wire wound resistor Metal oxide resistor Fixed resistor Hint 59). Which of the following statement is true for a resistor? It dissipates power It dissipates current it dissipates voltage It dissipates resistance Hint 60). Which of the following conductor is most frequently used? Copper Steel Bronze Iron Hint 61). A thermistor is a…? Resistor Switch Capacitor Diode Hint 62). When two 10 ohm resistors are connected in parallel connection then what will be the resistance value? 20 5 15 25 Hint 63). Which of the following instrument has less resistance? Ammeter Voltmeter Clamp mater Multimeter Hint 64). Which of the following statement is not appropriate to Ohm's law? AC circuits Resistors Capacitors Semiconductors Hint 65). The type of resistor like thermistor was invented by Samuel Ruben Ruben George Samuel Loughead George ruben Hint 66). Resistors are broadly available in… types? 3 3 5 6 Hint 67). Which of the following resistor is the example of fixed type resistor? Carbon film Metal strip Varistor Metal oxide Hint 68). If a wire’s resistance is Xohms and it is stretched to double to its length then what will be the resistance? 2X 2/X 6X X/4 Hint 69). Which of the following units is used to express conductance? Mho/m Mho M/ohm Ohm/m Hint 70). Resistor color code can be measured through…? Colored bands on resistor Its construction Based on its terminals Based on Weight Hint 71). Which of the following is the main drawback of carbon composition resistor? Extremely sensitive to temperature Huge weight Not strong Not widely used Hint Please refer to this link to know more about Carbon Composition Resistor 72). What is the resistance value range of carbon composition resistor? 1 Ω to 22 Mega Ω 1 Ω to 100 Mega Ω 1 Ω to 10 Giga Ω 1 Ω to 22 Kilo Ω Hint 73). Which of the following resistor is known as thermal resistor? Thermistor Carbon composition LDR Varistor Hint 74). Which of the following material is used to cover the wounded wire within wire wound resistor? Copper Baked enamel Zinc Thermistoir Silver Hint 75). The resistance value of wire wound resistor ranges from? 10 Mega Ohms to 100 Mega Ohms 1Ohm to 1 Mega Ohm 1Ohm to 100 Mega Ohm None of the above Hint Resistors MCQs for Quiz 76). The resistance value of wire wound resistor ranges from? 10 Mega Ohms to 100 Mega Ohms 1Ohm to 1 Mega Ohm 1Ohm to 100 Mega Ohm None of the above Hint 77). What is the typical tolerance value of wire wound resistor? 1 % - 15 % 0.5 % - 5% 0.01 % - 1 % 0.09 % - 7 % Hint 78). Which of the following resistor is called Non Linear? Varistor Wire wound Carbon composition LDR Hint 79). Varistors are available in ….types? 3 5 7 4 Hint 80). The resistance of an LDR mainly depends on…? Light intensity Temperature Construction Surroundings Hint 81). Magneto resistor is used to measure…? Resistance Magnetic fields Temperature Tolerance Hint 82). Photo resistor is also called as? Magneto resistor Carbon composition Varistor LDR Hint 83). When four resistors like 4 ohm are connected in parallel within the circuit then what will be the resistance value? 4 ohm 1 ohm 16 ohm 8 ohm Hint 84). When four resistors like 4 ohm are connected in series within the circuit then the resistance value is? 1 ohm 16 ohm 4 ohm 8 ohm Hint 85). In parallel connection, the resistance will be decreased because of…? Due to reduce in effective cross-section area Because of effective area increase for the cross section Reduce in length. Reduce in width Hint 86). Which of the following resistor have their own marking values? SMD Varistor Rheostat None of the above Hint 87). Which of the following type resistor uses a color coding system? SMD PTH Variable Resistor None of the above Hint 88). What is the tolerance for Gold color in a resistor? ±2% ±5% ±7% ±10% Hint 89). What is the Silver color tolerance of a resistor? ±5% ±8% ±10% ±15% Hint 90). Which of the following resistor is variable type? Trimmer LDR Rheostat a&c Hint 91). The wire precision resistor was invented by? Otis Frank Boykin Isaac newton Roger penrose Raymond A Hint 92). Variable resistor is used to control? Temperature Volume Resistance None of the above Hint Please refer to this link to know more about Variable Resistor 93). Ohms law is invented by…? Newton Charles Ohm None of the above Hint 94). Ohms law can be followed by…? Arc lamp Metal rectifier Crystal detector Copper electrode Hint 95). The Ohms law condition is... The temperature must be stable The ratio of voltage & current must be stable The temperature must change Current & voltage must be proportional Hint 96). 1V is equivalent to…? 1J/ 1C 1J/ 1W 1J/ 1C 1W/ 1Ohm Hint 97). Which of the following circuits uses Ohms law? Only reactive circuits Only resistive circuits Both a & b None of the above Hint 98). If the 20ohms resistance resistor carries 3A current then what is the voltage? 60V 23V 6.6V 17A Hint 99). In all over the series circuit, which of the quantity will remain the same? Current Power Resistance Voltage Hint 100). Which of the following component is passive? Resistor Transistor SCR MOSFET Hint ALL ABOVE ANSWER CLICK HERE https://www.watelectrical.com/mcq/resistors/