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Capacitors problems
1. What is the angle theta value for a 5.6 µF capacitor and a 50-ohm resistor in series with a 1.1 kHz, 5 V
ac
source?
Options
A. 27.3 degrees
B. 62.7 degrees
C. ?27.3 degrees
D. ?62.7 degrees
Show Answer
Scratch Pad
Discuss
Correct Answer: ?27.3 degrees
2. After a capacitor has charged for 1 tc, what percentage of current remains in the resistor?
Options
A. 63.2
B. 36.8
C. 13.5
D. 5.0
Show Answer
Scratch Pad
Discuss
Correct Answer: 36.8
3. What is the power factor if the apparent power of a circuit is 5 W, while the true power is 4 W?
Options
A. 0.0 W
B. 0.8 W
C. 1.0 W
D. 1.25 W
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.8 W
4. What is the reactive power?
Options
A. 6.8 mW
B. 9.8 mW
C. 12.8 mW
D. 15.8 mW
Show Answer
Scratch Pad
Discuss
Correct Answer: 9.8 mW
5. What is the circuit's total current?
Options
A. 4.57 mA
B. 9.327 mA
C. 11.570 mA
D. 13.830 mA
Show Answer
Scratch Pad
Discuss
Correct Answer: 4.57 mA
6. Capacitor value markings are usually:
Options
A. alphanumeric
B. color dabs
C. standard
D. white print
Show Answer
Scratch Pad
Discuss
Correct Answer: alphanumeric
7. A capacitor has 25 V across its plates and a stored charge of 1500 µC. What is the capacitance value?
Options
A. 60 pF
B. 60 µF
C. 16.67 mF
D. 37.5 mF
Show Answer
Scratch Pad
Discuss
Correct Answer: 60 µF
8. What is the impedance of a series RC circuit that consists of a 0.22 µF capacitor and a 200-ohm resistor connected to a 3 kHz source?
Options
A. 214 ohms
B. 313 ohms
C. 414 ohms
D. 880 ohms
Show Answer
Scratch Pad
Discuss
Correct Answer: 313 ohms
9. What will a 1 µF capacitor store?
Options
A. one coulomb of charge
B. 6.24 x 10
12
electrons
C. one volt
D. one µA of current
Show Answer
Scratch Pad
Discuss
Correct Answer: 6.24 x 10
12
electrons
10. What is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?
Options
A. 0.2 ohms
B. 3.5 ohms
C. 4.6 ohms
D. 13 ohms
Show Answer
Scratch Pad
Discuss
Correct Answer: 4.6 ohms
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More in Electronics:
Alternating Current and Voltage
Alternating Current vs Direct Current
Analog and Digital Converters
Analog to Digital
Arithmetic Operations and Circuits
Basic Op-Amp Circuits
Bipolar Junction Transistors (BJT)
Capacitors
Combinational Logic Circuits
Computer Hardware and Software
Diodes and Applications
Field Effect Transistors (FET)
Flip-Flops and Timers
Inductors
Logic Circuit Simplification
Logic Gates
Magnetism and Electromagnetism
Measurement, Conversion and Control
Number Systems and Codes
Ohm's Law
Operational Amplifiers
Parallel Circuits
Programmable Logic Devices (PLD)
Quantities and Units
RC Circuits
Resistance and Power
RL Circuits
RLC Circuits and Resonance
Semiconductor Memory
Semiconductor Principles
Sequential Logic Circuits
Series-Parallel Circuits
Series Circuits
Special-Purpose Op-Amp Circuits
Standard Logic Devices (SLD)
Testing and Troubleshooting
Thyristors and Tranducers
Time Response of Reactive Circuits
Transformers
Transistors and Applications
Voltage and Current
