Podcast
Questions and Answers
How many electrons are present in the third electron shell of a copper atom?
How many electrons are present in the third electron shell of a copper atom?
- 13
- 18 (correct)
- 29
- 8
Which of the following materials is classified as a semiconductor?
Which of the following materials is classified as a semiconductor?
- Ebonite
- Eureka
- Manganin
- Germanium (correct)
What indicates the condition of a neon polarity indicator when checking an AC supply?
What indicates the condition of a neon polarity indicator when checking an AC supply?
- Both electrodes will glow (correct)
- Both electrodes will be flickering
- Only one electrode will glow
- One electrode will glow and another will be flickering
Calculate the electrical energy consumed (in units) by a 500W lamp operating for 5 hours.
Calculate the electrical energy consumed (in units) by a 500W lamp operating for 5 hours.
What is the approximate resistance of a light bulb rated at 100W when connected to a 250V supply?
What is the approximate resistance of a light bulb rated at 100W when connected to a 250V supply?
Which law states that in a closed electrical circuit, the sum of voltage drops is equal to the applied voltage?
Which law states that in a closed electrical circuit, the sum of voltage drops is equal to the applied voltage?
Two lamps, each rated 200W/240V, are connected in series across a 240V supply. What is the total power consumed by the circuit?
Two lamps, each rated 200W/240V, are connected in series across a 240V supply. What is the total power consumed by the circuit?
What is the formula to calculate the total resistance (RT) when three resistors, R1, R2, and R3, are connected in parallel?
What is the formula to calculate the total resistance (RT) when three resistors, R1, R2, and R3, are connected in parallel?
An ohmmeter is connected across resistor 'R2', which is open-circuited. What reading will the ohmmeter display?
An ohmmeter is connected across resistor 'R2', which is open-circuited. What reading will the ohmmeter display?
If the diameter of a conductor is doubled, what is the effect on its resistance, assuming all other factors remain the same?
If the diameter of a conductor is doubled, what is the effect on its resistance, assuming all other factors remain the same?
A resistor is constructed using a wire wound around a ceramic core. What type of resistor is this?
A resistor is constructed using a wire wound around a ceramic core. What type of resistor is this?
A resistor has the following color bands: Red, Blue, Orange, and Silver. What is its resistance value, considering the tolerance?
A resistor has the following color bands: Red, Blue, Orange, and Silver. What is its resistance value, considering the tolerance?
Why is the scale of an ohmmeter typically non-linear?
Why is the scale of an ohmmeter typically non-linear?
In a balanced Wheatstone bridge, PAB = 500Ω, QBC = 300Ω, and SAO = 15Ω. Calculate the value of the unknown resistance 'RDC'.
In a balanced Wheatstone bridge, PAB = 500Ω, QBC = 300Ω, and SAO = 15Ω. Calculate the value of the unknown resistance 'RDC'.
Which material exhibits a negative temperature coefficient, meaning its resistance decreases as temperature increases?
Which material exhibits a negative temperature coefficient, meaning its resistance decreases as temperature increases?
What relationship between electrical quantities is defined by Ohm's Law?
What relationship between electrical quantities is defined by Ohm's Law?
In a parallel circuit, the total current is 6A, and the current through resistor R1 is 4A. Calculate the current through R2 if only R1 and R2 are present.
In a parallel circuit, the total current is 6A, and the current through resistor R1 is 4A. Calculate the current through R2 if only R1 and R2 are present.
What effect does opening one branch have on a parallel circuit?
What effect does opening one branch have on a parallel circuit?
What is the unit of resistivity?
What is the unit of resistivity?
Which type of resistor is commonly used for arc quenching in circuit breakers?
Which type of resistor is commonly used for arc quenching in circuit breakers?
A resistor has the following color bands: Red, Red, Black, Orange, and Green. What is the resistance value with tolerance?
A resistor has the following color bands: Red, Red, Black, Orange, and Green. What is the resistance value with tolerance?
In a balanced Wheatstone bridge configuration, PAB = 400 ohms, QBC = 200 ohms, and SAD = 12 ohms. What is the value of the unknown resistance RDC?
In a balanced Wheatstone bridge configuration, PAB = 400 ohms, QBC = 200 ohms, and SAD = 12 ohms. What is the value of the unknown resistance RDC?
In the circuit shown, what is the reading on the voltmeter V, given the total voltage is 18V and it's connected across two equal resistors in series?
In the circuit shown, what is the reading on the voltmeter V, given the total voltage is 18V and it's connected across two equal resistors in series?
Which application is a practical example of using a series circuit?
Which application is a practical example of using a series circuit?
What effect occurs in a series circuit if one of the resistors becomes open-circuited?
What effect occurs in a series circuit if one of the resistors becomes open-circuited?
Given a circuit with a total resistance of 24 Ohms and two resistors R1= 8 Ohms and R2 = 4 Ohms in series, calculate resistance of R3 if all three are in series.
Given a circuit with a total resistance of 24 Ohms and two resistors R1= 8 Ohms and R2 = 4 Ohms in series, calculate resistance of R3 if all three are in series.
In a circuit, if the 'ab' points are shorted, what is the likely effect on the circuit?
In a circuit, if the 'ab' points are shorted, what is the likely effect on the circuit?
What is the name of a resistor whose resistance value increases with an increase in temperature?
What is the name of a resistor whose resistance value increases with an increase in temperature?
Which formula correctly expresses the relationship for the quantity of electricity (Q) transferred?
Which formula correctly expresses the relationship for the quantity of electricity (Q) transferred?
What is the unit of conductance?
What is the unit of conductance?
Which term describes the change in resistance per degree centigrade (°C)?
Which term describes the change in resistance per degree centigrade (°C)?
Which type of meter is suitable for determining the polarity of a DC battery?
Which type of meter is suitable for determining the polarity of a DC battery?
In a series circuit with resistors R1 = 5 ohms, R2 = 10 ohms and a supply voltage of 30 volts, what is the voltage drop across resistor R2?
In a series circuit with resistors R1 = 5 ohms, R2 = 10 ohms and a supply voltage of 30 volts, what is the voltage drop across resistor R2?
Which application primarily utilizes a series circuit?
Which application primarily utilizes a series circuit?
Which method is commonly employed for measuring resistances in the range of 1 Ohm to 100k Ohm?
Which method is commonly employed for measuring resistances in the range of 1 Ohm to 100k Ohm?
What is the S.I. unit for indicating specific resistance?
What is the S.I. unit for indicating specific resistance?
A resistor has color bands Orange, Orange, Red and Gold. What is its resistance and tolerance?
A resistor has color bands Orange, Orange, Red and Gold. What is its resistance and tolerance?
In a series-type ohmmeter circuit, what is the primary purpose of the shunt resistor ‘R2’?
In a series-type ohmmeter circuit, what is the primary purpose of the shunt resistor ‘R2’?
Which electrical quantity has the most direct impact on the amount of heat generated in a conductor?
Which electrical quantity has the most direct impact on the amount of heat generated in a conductor?
If the cross-sectional area of a conductor is doubled, how does its resistance change?
If the cross-sectional area of a conductor is doubled, how does its resistance change?
A circuit contains resistors R1, R2, R3 and R4 in series with a total supply voltage of 200V. If the voltage drops across R1, R2, and R3 are 20V, 36V, and 64V respectively, calculate the voltage drop across resistor R4.
A circuit contains resistors R1, R2, R3 and R4 in series with a total supply voltage of 200V. If the voltage drops across R1, R2, and R3 are 20V, 36V, and 64V respectively, calculate the voltage drop across resistor R4.
What occurs to the resistance of a Light Dependent Resistor (LDR) when the intensity of light increases?
What occurs to the resistance of a Light Dependent Resistor (LDR) when the intensity of light increases?
Which formula is used to calculate power in a DC circuit?
Which formula is used to calculate power in a DC circuit?
What is the approximate hot resistance of a 200W / 250V rated lamp?
What is the approximate hot resistance of a 200W / 250V rated lamp?
What is the resistance value in an open circuit?
What is the resistance value in an open circuit?
In a parallel circuit containing resistors with values of 50Ω, 220Ω, 450Ω, and 560Ω, which resistor will have the least current flowing through it?
In a parallel circuit containing resistors with values of 50Ω, 220Ω, 450Ω, and 560Ω, which resistor will have the least current flowing through it?
What is the approximate specific resistance value of copper?
What is the approximate specific resistance value of copper?
Which property is inversely proportional to the resistance of a conductor?
Which property is inversely proportional to the resistance of a conductor?
Flashcards
Semiconductor Material
Semiconductor Material
Germanium is a semiconductor material.
Neon Polarity Indicator in AC
Neon Polarity Indicator in AC
In an AC supply, both electrodes of a neon polarity indicator will glow.
Kirchhoff’s Second Law
Kirchhoff’s Second Law
In a closed electric circuit, the applied voltage equals the sum of all voltage drops.
Equivalent Resistance in Parallel
Equivalent Resistance in Parallel
Signup and view all the flashcards
Ohmmeter Reading Across Open Resistor
Ohmmeter Reading Across Open Resistor
Signup and view all the flashcards
Effect of Doubling Conductor Diameter
Effect of Doubling Conductor Diameter
Signup and view all the flashcards
Wire Wound Resistor
Wire Wound Resistor
Signup and view all the flashcards
Why Non-Linear Ohmmeter Scale?
Why Non-Linear Ohmmeter Scale?
Signup and view all the flashcards
Material with Negative Temperature Coefficient
Material with Negative Temperature Coefficient
Signup and view all the flashcards
Quantities Related in Ohm’s Law
Quantities Related in Ohm’s Law
Signup and view all the flashcards
Effect of Open Branch in Parallel Circuit
Effect of Open Branch in Parallel Circuit
Signup and view all the flashcards
Unit of Resistivity
Unit of Resistivity
Signup and view all the flashcards
Resistor for Arc Quenching
Resistor for Arc Quenching
Signup and view all the flashcards
Application of Series Circuit
Application of Series Circuit
Signup and view all the flashcards
Effect on Opened Resistor in Series
Effect on Opened Resistor in Series
Signup and view all the flashcards
Effect of Shorted Points in Circuit
Effect of Shorted Points in Circuit
Signup and view all the flashcards
Sensistors
Sensistors
Signup and view all the flashcards
Formula for Quantity of Electricity
Formula for Quantity of Electricity
Signup and view all the flashcards
Unit of Conductance
Unit of Conductance
Signup and view all the flashcards
Change in resistance in Ohm(Ω) per degree centigrade (°C)
Change in resistance in Ohm(Ω) per degree centigrade (°C)
Signup and view all the flashcards
Meter used to test the polarity of battery?
Meter used to test the polarity of battery?
Signup and view all the flashcards
Application of Series Circuit
Application of Series Circuit
Signup and view all the flashcards
Which method is used for measuring 1 Ohm to 100K Ohm range resistance?
Which method is used for measuring 1 Ohm to 100K Ohm range resistance?
Signup and view all the flashcards
What is the S.I unit of specific resistance?
What is the S.I unit of specific resistance?
Signup and view all the flashcards
the purpose of the shunt resistor ‘R2’ used in series type Ohm meter circuit?
the purpose of the shunt resistor ‘R2’ used in series type Ohm meter circuit?
Signup and view all the flashcards
Which electrical quantity affects the heat generated in a conductor?
Which electrical quantity affects the heat generated in a conductor?
Signup and view all the flashcards
conductor, if its cross section area is doubled
conductor, if its cross section area is doubled
Signup and view all the flashcards
Light Dependent Resistor (LDR), if the intensity of light is increased
Light Dependent Resistor (LDR), if the intensity of light is increased
Signup and view all the flashcards
inversely proportional to the resistance of a conductor?
inversely proportional to the resistance of a conductor?
Signup and view all the flashcards
Study Notes
- There are 18 electrons in the third cell of a copper atom.
- Germanium is a semiconductor material.
- In a neon polarity indicator used for checking AC supply, both electrodes will glow.
- A 500W lamp consumes 2.5 units of electrical energy in 5 hours.
- The hot resistance of a 100W/250V rated bulb is 625.00 ohm.
- Kirchhoff’s second law says that in a closed electric circuit, the applied voltage equals the sum of the voltage drops.
- The total power of a circuit with two 200W/240V lamps connected in series across a 240V supply is 100 W.
- The formula for equivalent resistance (RT) of three resistors R1, R2 & R3 in a parallel circuit is RT = 1 / (1/R1 + 1/R2 + 1/R3).
- An ohmmeter reads infinite resistance across an opened ‘R2’ resistor.
- If the diameter of a conductor is doubled, its resistance value decreases to four times the original value.
- The resistor shown in the image is a wire wound resistor.
- From the colour coding, the resistance value of the resistor is 26 x 103 W ± 10%.
- An ohmmeter is graduated with a non-linear scale because current is inversely proportional to resistance.
- In a Wheatstone bridge network with PAB = 500W, QBC = 300W, SAo = 15W, the value of unknown resistance ‘RDC’ at balanced condition is 9 Ω.
- Mica has a negative temperature co-efficient property.
- Ohm’s law relates current, voltage, and resistance.
- In the parallel circuit, the value of resistance ‘R2’ is 6 Ω.
- In a parallel circuit, if one branch opens, no current will flow in that branch.
- The unit of resistivity is ohm-metre.
- Varistors are used for arc quenching protection in circuit breakers.
- From the colour coding method, the value of resistance is 25 x 103 ± 5%.
- In a Wheatstone bridge circuit, if PAB=400 ohms, QBC=200 ohms and SAD=12 ohms at balanced condition, the unknown resistance “RDC” is 6 Ω.
- The reading of the voltmeter V is 18 V.
- A series circuit is used in the multiplier resistor of a voltmeter.
- If a resistor is opened in a series circuit, the total supply voltage will appear across the opened resistor.
- The resistance value in the R3 resistor is 12 Ohm.
- If ‘ab’ points are shorted, the circuit resistance will be zero.
- A sensistor's resistance value increases with an increase in temperature.
- The formula for Quantity of electricity (Q) is Current x Time.
- The unit of conductance is Mho.
- Temperature co-efficient defines the change in resistance in Ohm(Ω) per degree centigrade (°C).
- A moving coil voltmeter tests the polarity of a battery.
- The voltage drop in resistor ‘R2’ in the series circuit is 10 volt.
- A series circuit application is a fuse in a circuit.
- The Wheatstone bridge method measures resistance in the range of 1 Ohm to 100K Ohm.
- The S.I unit of specific resistance is Ohm-metre.
- The value of resistance of the resistor is 3300 ± 10% Ohm.
- The shunt resistor ‘R2’ in a series type Ohm meter circuit is used to adjust the zero position of the pointer.
- The heat generated in a conductor is affected by the square of the current.
- If the cross-sectional area of a conductor is doubled, its resistance decreases 2 times.
- The voltage drop across the resistor ‘R4’ in the circuit is 100 V.
- The resistance of a Light Dependent Resistor (LDR) decreases if the light intensity is increased.
- The formula used to calculate the power of a DC circuit is Current x Voltage.
- The hot resistance of a 200W / 250V rated lamp is 312.5 Ω.
- The value of resistance in an open circuit is infinity.
- The lowest current flows through the 560Ω resistor in a parallel circuit with resistors of 50Ω, 220Ω, 450 Ω, and 560Ω.
- The specific resistance value of a copper conductor is 1.72 Micro ohm/cm3.
- The area of cross section is inversely proportional to the resistance of a conductor.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
