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Questions and Answers
What is the time taken by the voltage represented by $v = 100 ext{sin}240 ext{π}t$ to reach 50V for the first time?
What is the time taken by the voltage represented by $v = 100 ext{sin}240 ext{π}t$ to reach 50V for the first time?
- 695 ms
- 695 μs (correct)
- 358 ms
- 358 μs
What is the magnitude of the phase angle for a 2 kohm resistor in series with a 0.015 uF capacitor across a 15 kHz AC source?
What is the magnitude of the phase angle for a 2 kohm resistor in series with a 0.015 uF capacitor across a 15 kHz AC source?
- 44.5° (correct)
- 26.5°
- 32.5°
- 19.5°
Given a waxed paper capacitor with an effective area of 800 sq.cm and a capacitance of 4425 pF, what is the effective thickness of the paper if its relative permittivity is 2.5?
Given a waxed paper capacitor with an effective area of 800 sq.cm and a capacitance of 4425 pF, what is the effective thickness of the paper if its relative permittivity is 2.5?
- 0.4 mm (correct)
- 0.2 mm
- 0.4 cm
- 0.2 cm
What is the effective voltage of the equation $v = 100 ext{sin}120 ext{π}t$?
What is the effective voltage of the equation $v = 100 ext{sin}120 ext{π}t$?
What is the capacitance of a parallel plate capacitor with $k=81$, $d=0.025$ inches, and $A=6$ square inches?
What is the capacitance of a parallel plate capacitor with $k=81$, $d=0.025$ inches, and $A=6$ square inches?
If capacitors with capacitances of 2F, 4F, and 6F are connected in parallel, what is the total capacitance?
If capacitors with capacitances of 2F, 4F, and 6F are connected in parallel, what is the total capacitance?
What is the total charge stored in capacitors of 1 µF, 3 µF, 5 µF, and 6 µF connected in parallel to a 100 V supply?
What is the total charge stored in capacitors of 1 µF, 3 µF, 5 µF, and 6 µF connected in parallel to a 100 V supply?
Which of the following correctly describes how to calculate the effective capacitance of capacitors connected in series?
Which of the following correctly describes how to calculate the effective capacitance of capacitors connected in series?
What is the energy stored in a 150 mH inductor when the current is given by $i=0.32t$ A at $t=4ms$?
What is the energy stored in a 150 mH inductor when the current is given by $i=0.32t$ A at $t=4ms$?
What is the total resistance of ten resistors, each of value R, wired in parallel?
What is the total resistance of ten resistors, each of value R, wired in parallel?
If the force between two charges is 120 N and the distance is doubled, what will be the new force?
If the force between two charges is 120 N and the distance is doubled, what will be the new force?
What will be the electric field intensity at 2 meters from a point if it was 200 N/C at 4 meters?
What will be the electric field intensity at 2 meters from a point if it was 200 N/C at 4 meters?
What will be true about a general-purpose carbon-composition type resistor?
What will be true about a general-purpose carbon-composition type resistor?
What describes the lines of force due to charged particles?
What describes the lines of force due to charged particles?
What is the relationship of electric field strength to distance from a straight charged conductor?
What is the relationship of electric field strength to distance from a straight charged conductor?
Which resistor is best in terms of accuracy and precision?
Which resistor is best in terms of accuracy and precision?
What is the effect of connecting an additional parallel load to an electrical supply source?
What is the effect of connecting an additional parallel load to an electrical supply source?
What are 'Y' networks also known as?
What are 'Y' networks also known as?
If resistor A carries twice the current of resistor B, what can be inferred about their resistances?
If resistor A carries twice the current of resistor B, what can be inferred about their resistances?
What determines if resistor connections are in series, parallel, or series-parallel?
What determines if resistor connections are in series, parallel, or series-parallel?
Which of the following networks corresponds to the so-called π-network of resistors?
Which of the following networks corresponds to the so-called π-network of resistors?
Which statement regarding the current-divider rule is accurate?
Which statement regarding the current-divider rule is accurate?
If two equal-value inductors are connected in parallel, what is their total inductance?
If two equal-value inductors are connected in parallel, what is their total inductance?
What is defined as the ability of a device or component to oppose a change in current?
What is defined as the ability of a device or component to oppose a change in current?
Which configuration of resistors has the correct order from lowest to highest resistance?
Which configuration of resistors has the correct order from lowest to highest resistance?
What effect does increasing the plate area of a capacitor have on its capacitance?
What effect does increasing the plate area of a capacitor have on its capacitance?
When connecting capacitors in series, how is the total voltage drop calculated?
When connecting capacitors in series, how is the total voltage drop calculated?
Which statement is true regarding air-core coils?
Which statement is true regarding air-core coils?
Induced voltage in a coil is present under which condition?
Induced voltage in a coil is present under which condition?
When inductances are connected in series, how does the equivalent inductance compare to the largest individual inductance?
When inductances are connected in series, how does the equivalent inductance compare to the largest individual inductance?
Which of the following statements about coils is FALSE?
Which of the following statements about coils is FALSE?
How does capacitance change with a decrease in the distance between the capacitor plates?
How does capacitance change with a decrease in the distance between the capacitor plates?
What is the purpose of step-up and step-down transformers in AC circuits?
What is the purpose of step-up and step-down transformers in AC circuits?
Which of the following correctly describes the root-mean-squared (rms) value?
Which of the following correctly describes the root-mean-squared (rms) value?
In a series circuit with a resistor and a capacitor, what is the impedance expressed in rectangular form?
In a series circuit with a resistor and a capacitor, what is the impedance expressed in rectangular form?
What happens to the voltage across each impedance in a parallel circuit?
What happens to the voltage across each impedance in a parallel circuit?
If the current and voltage are 90 degrees out of phase, what will be the power factor?
If the current and voltage are 90 degrees out of phase, what will be the power factor?
Which of the following components is represented as a positive imaginary number in AC analysis?
Which of the following components is represented as a positive imaginary number in AC analysis?
What occurs in an inductive circuit regarding voltage and current?
What occurs in an inductive circuit regarding voltage and current?
Which of the following is not an example of true power?
Which of the following is not an example of true power?
Which of the following statements about angle measurement is true?
Which of the following statements about angle measurement is true?
What is the term for power measured in volt-amperes?
What is the term for power measured in volt-amperes?
How does the power factor in an inductive circuit change when the inductive reactance (XL) increases?
How does the power factor in an inductive circuit change when the inductive reactance (XL) increases?
In the context of alternating current, how does a coil behave as the frequency increases?
In the context of alternating current, how does a coil behave as the frequency increases?
What is the peak value divided by the RMS value called?
What is the peak value divided by the RMS value called?
Which value is often referred to as the DC value of a waveform?
Which value is often referred to as the DC value of a waveform?
What is true regarding the electrostatic field inside a perfect conductor?
What is true regarding the electrostatic field inside a perfect conductor?
In relation to potential inside a perfect conductor, which statement is correct?
In relation to potential inside a perfect conductor, which statement is correct?
Flashcards
Time for voltage to reach 50V (100sin240πt)
Time for voltage to reach 50V (100sin240πt)
358 µs
Phase angle (2 kΩ resistor, 0.015 µF capacitor, 15 kHz)
Phase angle (2 kΩ resistor, 0.015 µF capacitor, 15 kHz)
26.5°
Capacitor paper thickness (800 sq.cm area, 4425 pF capacitance, relative permittivity 2.5)
Capacitor paper thickness (800 sq.cm area, 4425 pF capacitance, relative permittivity 2.5)
0.2 mm
Effective voltage (v = 100sin120πt)
Effective voltage (v = 100sin120πt)
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Capacitance (k=81, d=0.025 inches, A=6 sq.inches)
Capacitance (k=81, d=0.025 inches, A=6 sq.inches)
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Effective parallel capacitance (2F, 4F, 6F)
Effective parallel capacitance (2F, 4F, 6F)
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Total charge (1 µF, 3µF, 5µF, 6µF, 100 V parallel)
Total charge (1 µF, 3µF, 5µF, 6µF, 100 V parallel)
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Capacitor in parallel effective capacitance
Capacitor in parallel effective capacitance
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Energy stored in inductor (t=4ms)
Energy stored in inductor (t=4ms)
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Resistors in parallel
Resistors in parallel
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Frequency of periodic waveform
Frequency of periodic waveform
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Supply voltage in R-L circuit
Supply voltage in R-L circuit
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Force between charges (distance doubled)
Force between charges (distance doubled)
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Electric field intensity (distance reduced)
Electric field intensity (distance reduced)
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Resistor power rating and size
Resistor power rating and size
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Lines of force for charged particles
Lines of force for charged particles
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Resistor Color Bands (4 bands, silver)
Resistor Color Bands (4 bands, silver)
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Resistor Color Bands (4 bands, gold)
Resistor Color Bands (4 bands, gold)
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Resistor Color Bands (5 bands, violet)
Resistor Color Bands (5 bands, violet)
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Resistor Color Bands (5 bands, red)
Resistor Color Bands (5 bands, red)
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Resistor Ordering (lowest to highest)
Resistor Ordering (lowest to highest)
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Capacitance and Plate Area
Capacitance and Plate Area
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Series Capacitors, Total Voltage Drop
Series Capacitors, Total Voltage Drop
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Air-core Coils and Efficiency
Air-core Coils and Efficiency
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Parallel Load Effect
Parallel Load Effect
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Y Network
Y Network
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Parallel Resistors and Current
Parallel Resistors and Current
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Series, Parallel, or Series-Parallel?
Series, Parallel, or Series-Parallel?
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π Network
π Network
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Current Divider Rule
Current Divider Rule
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Parallel Inductors
Parallel Inductors
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Series-Aiding Coils
Series-Aiding Coils
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What is measured in degrees or radians?
What is measured in degrees or radians?
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What is apparent power?
What is apparent power?
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How does inductive reactance affect circuit power factor?
How does inductive reactance affect circuit power factor?
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Current direction for an inductor
Current direction for an inductor
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How does AC frequency affect coil reactance?
How does AC frequency affect coil reactance?
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What kind of component has this V-I relationship?
What kind of component has this V-I relationship?
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Why is AC preferred over DC?
Why is AC preferred over DC?
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Peak value of a sinusoidal waveform
Peak value of a sinusoidal waveform
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Why are high voltages used in power transmission?
Why are high voltages used in power transmission?
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What are the characteristics of an alternating waveform?
What are the characteristics of an alternating waveform?
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What is the root-mean-squared (rms) value?
What is the root-mean-squared (rms) value?
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Which quantities are represented as imaginary numbers in AC circuits?
Which quantities are represented as imaginary numbers in AC circuits?
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What is impedance in rectangular form?
What is impedance in rectangular form?
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Which quantities are represented as positive imaginary numbers?
Which quantities are represented as positive imaginary numbers?
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How does voltage relate to current in an inductive circuit?
How does voltage relate to current in an inductive circuit?
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What happens to the phase angle in a series RL circuit when frequency decreases?
What happens to the phase angle in a series RL circuit when frequency decreases?
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Study Notes
Electronics Engineering Review Part 1 Term Test
- Instructions: Answer questions by shading the correct letter on the back of the questionnaire. Use pen or pencil only and avoid erasures. Use the back for scratch work. Cheating will result in disciplinary action.
Question 1
- Problem: Find the time it takes for an alternating voltage (v = 100sin240πt) to reach 50V for the first time.
- Options: a) 358 µs, b) 695 µs, c) 358 ms, d) 695 ms
- Correct Answer: 358 ms
Question 2
- Problem: A 2 kΩ resistor is in series with a 0.015 µF capacitor across a 15 kHz AC source. Find the magnitude of the phase angle.
- Options: a) 19.5°, b) 26.5°, c) 32.5°, d) 44.5°
- Correct Answer: 19.5°
Question 3
- Problem: A waxed paper capacitor with two parallel plates (each with an effective area of 800 sq. cm) and a capacitance of 4425 pF has a relative permittivity of 2.5. Determine the effective thickness of the paper.
- Options: a) 0.2 mm, b) 0.4 mm, c) 0.2 cm, d) 0.4 cm
- Correct Answer: 0.4 mm
Question 4
- Problem: Determine the effective voltage of v = 100sin120πt.
- Options: a) 31.80 V, b) 35.35 V, c) 70.71 V, d) 90.00 V
- Correct Answer: 70.71 V
Question 5
- Problem: A parallel plate capacitor has values: k=81, d=0.025 inches, A=6 square inches. Calculate its capacitance.
- Options: a) 4372 pF, b) 437.2 pF, c) 4.372 pF, d) 43.72 pF
- Correct Answer: 4372 pF
Question 6
- Problem: Three capacitors (2F, 4F, and 6F) are connected in parallel. Calculate the effective capacitance.
- Correct Answer: 12 F
Question 7
- Problem: Capacitances (1 µF, 3 µF, 5 µF, and 6 µF) are connected in parallel to a 100V supply. Calculate the total charge.
- Options: a) 0.1 mC, b) 0.6 mC, c) 1.5 mC, d) 1.8 mC
- Correct Answer: 1.5 mC
Question 8
-
Problem: A current (i = 0.32t) flows through a 150 mH inductor. Find the energy stored at t=4ms.
-
Options: a) 0.123 J, b) 1.229 J, c) 12.288 nJ, d) 122.88 nJ
-
Correct Answer: 12.288 nJ
Question 9
-
Problem: Ten resistors of equal value are wired in parallel. What is the total resistance?
-
Options: a) 10/R, b) R/10, c) 10+R, d) 10 x R
-
Correct Answer: 10/R
Question 10
- Problem: Determine the frequency of the periodic waveform shown (figure not included).
- Options: a) 62.5 Hz, b) 82.5 Hz, c) 625 Hz, d) 825 Hz
- Correct Answer: 62.5 Hz
Question 11
- Problem: a series R-L circuit has PD across R = 12V and PD across L = 5V. Calculate the supply voltage.
- Options: a) 7.0 V, b) 8.5 V, c) 13 V, d) 17 V
- Correct Answer: 13 V
- (and so on, continuing this format for the remaining questions)*
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Description
Test your knowledge in Electronics Engineering with this review quiz covering key concepts such as alternating voltage and capacitance calculations. Each question requires you to select the correct answer from multiple options provided. Perfect for students preparing for exams in this field.
