MCQOPTIONS
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MCQOPTIONS
This section includes 50 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
is inversely proportional to frequency and capacitance. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
A 0.01 F capacitor equals how many picofarads? |
| A. | 100 pF |
| B. | 1,000 pF |
| C. | 10,000 pF |
| D. | 100,000 pF |
| Answer» D. 100,000 pF | |
| 3. |
A 12 kHz voltage is applied to a 0.33 F capacitor, and 200 mA of rms current is measured. What is the value of the voltage? |
| A. | 8 V |
| B. | 80 V |
| C. | 80 mV |
| D. | 800 mV |
| Answer» B. 80 V | |
| 4. |
A 4.7 M resistor is in series with a 0.015 F capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge? |
| A. | 35 ms |
| B. | 352 ms |
| C. | 3.5 s |
| D. | 70.5 ms |
| Answer» C. 3.5 s | |
| 5. |
A capacitor of 0.02 F is larger than |
| A. | 0.000020 F |
| B. | 200,000 pF |
| C. | 2,000 pF |
| D. | all of the above |
| Answer» D. all of the above | |
| 6. |
A 0.47 F capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is |
| A. | 170 |
| B. | 17 |
| C. | 0.000169 |
| D. | 1.7 |
| Answer» B. 17 | |
| 7. |
An uncharged capacitor and a 1 k resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is |
| A. | 6 V |
| B. | 3 V |
| C. | 2 V |
| D. | 0 V |
| Answer» E. | |
| 8. |
Two 0.68 F capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is |
| A. | 46.8 |
| B. | 4.68 |
| C. | 23.41 |
| D. | 11.70 |
| Answer» B. 4.68 | |
| 9. |
Four 0.15 µF capacitors are in parallel. The total capacitance is |
| A. | .15 µF |
| B. | .30 µF |
| C. | .6 µF |
| D. | .8 µF |
| Answer» D. .8 µF | |
| 10. |
A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is |
| A. | .43 µF |
| B. | .86 µF |
| C. | 00 µF |
| D. | 52 µF |
| Answer» E. | |
| 11. |
A 4.7 MΩ resistor is in series with a 0.015 µF capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge? |
| A. | 5 ms |
| B. | 52 ms |
| C. | .5 ms |
| D. | 0.5 ms |
| Answer» C. .5 ms | |
| 12. |
A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is |
| A. | 8 µs |
| B. | 80 µs |
| C. | .42 µs |
| D. | 4 µs |
| Answer» C. .42 µs | |
| 13. |
A 0.00022 F capacitor equals how many micro-farads? |
| A. | 2 µF |
| B. | 20 µF |
| C. | ,200 µF |
| D. | 2,200 µF |
| Answer» C. ,200 µF | |
| 14. |
Two series capacitors (one 2 µF, the other of unknown value) are charged from a 24 V source. The 2 µF capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is |
| A. | µF |
| B. | µF |
| C. | µF |
| D. | µF |
| Answer» D. µF | |
| 15. |
An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is |
| A. | V |
| B. | V |
| C. | V |
| D. | V |
| Answer» E. | |
| 16. |
Capacitance is directly proportional to plate area and plate separation. |
| A. | rue |
| B. | alse |
| Answer» C. | |
| 17. |
XC is inversely proportional to frequency and capacitance. |
| A. | rue |
| B. | alse |
| Answer» B. alse | |
| 18. |
Energy is stored by a capacitor in a magnetic field. |
| A. | rue |
| B. | alse |
| Answer» C. | |
| 19. |
A 2 µF, a 4 µF, and a 10 µF capacitor are connected in series. The total capacitance is less than |
| A. | µF |
| B. | µF |
| C. | 0 µF |
| D. | .5 µF |
| Answer» E. | |
| 20. |
A 12 kHz voltage is applied to a 0.33 µF capacitor, and 200 mA of rms current is measured. What is the value of the voltage? |
| A. | V |
| B. | 0 V |
| C. | 00 V |
| D. | .88 V |
| Answer» B. 0 V | |
| 21. |
A 0.01 µF capacitor equals how many picofarads? |
| A. | 00 pF |
| B. | ,000 pF |
| C. | 0,000 pF |
| D. | 00,000 pF |
| Answer» D. 00,000 pF | |
| 22. |
The dielectric constant is the ability of a material to establish an electric field. |
| A. | rue |
| B. | alse |
| Answer» B. alse | |
| 23. |
A 0.47 µF capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is |
| A. | 70 Ω |
| B. | 7 Ω |
| C. | .000169 Ω |
| D. | .7 Ω |
| Answer» B. 7 Ω | |
| 24. |
Two 0.68 µF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is |
| A. | 6.8 Ω |
| B. | .68 Ω |
| C. | 3.41 Ω |
| D. | 1.70 Ω |
| Answer» B. .68 Ω | |
| 25. |
A capacitor blocks A.C. but passes D.C. |
| A. | rue |
| B. | alse |
| Answer» C. | |
| 26. |
The true power in a capacitor is zero. |
| A. | rue |
| B. | alse |
| Answer» B. alse | |
| 27. |
A capacitor of 0.02 µF is larger than |
| A. | .000020 F |
| B. | 00,000 pF |
| C. | ,000 pF |
| D. | ll of the above |
| Answer» D. ll of the above | |
| 28. |
Voltage leads current by 90° in a capacitor. |
| A. | rue |
| B. | alse |
| Answer» C. | |
| 29. |
What is the capacitance when Q = 60 µC and V = 12 V? |
| A. | 20 µF |
| B. | µF |
| C. | 0 µF |
| D. | 2 µF |
| Answer» C. 0 µF | |
| 30. |
A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current |
| A. | increases |
| B. | remains constant |
| C. | decreases |
| D. | ceases |
| Answer» D. ceases | |
| 31. |
Voltage leads current by 90° in a capacitor. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» C. 1 | |
| 32. |
An uncharged capacitor and a 1 k resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is |
| A. | 6 V |
| B. | 3 V |
| C. | 2 V |
| D. | 0 V |
| Answer» E. | |
| 33. |
Total parallel capacitance is less than that of the smallest capacitor in parallel. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 34. |
Five time constants are required for a capacitor to charge fully or discharge fully. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 35. |
The ohm is the unit of capacitance. |
| A. | 1 |
| B. | |
| Answer» C. | |
| 36. |
Which of the following capacitors is polarized? |
| A. | mica |
| B. | ceramic |
| C. | plastic-film |
| D. | electrolytic |
| Answer» E. | |
| 37. |
A 0.01 F capacitor equals how many picofarads? |
| A. | 100 pF |
| B. | 1,000 pF |
| C. | 10,000 pF |
| D. | 100,000 pF |
| Answer» D. 100,000 pF | |
| 38. |
Two series capacitors (one 2 F, the other of unknown value) are charged from a 24 V source. The 2 F capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is |
| A. | 1 F |
| B. | 2 F |
| C. | 4 F |
| D. | 8 F |
| Answer» D. 8 F | |
| 39. |
Four 0.15 F capacitors are in parallel. The total capacitance is |
| A. | 0.15 F |
| B. | 0.30 F |
| C. | 0.6 F |
| D. | 0.8 F |
| Answer» D. 0.8 F | |
| 40. |
When the plate area of a capacitor increases, |
| A. | the capacitance increases |
| B. | the capacitance decreases |
| C. | the capacitance is unaffected |
| D. | the voltage it can withstand increases. |
| Answer» B. the capacitance decreases | |
| 41. |
A 0.47 F capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is |
| A. | 170 |
| B. | 17 |
| C. | 0.000169 |
| D. | 1.7 |
| Answer» B. 17 | |
| 42. |
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased |
| A. | VR > VC |
| B. | VC > VR |
| C. | VR = VC |
| D. | VR and VC = 0 |
| Answer» B. VC > VR | |
| 43. |
Two 0.68 F capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is |
| A. | 46.8 |
| B. | 4.68 |
| C. | 23.41 |
| D. | 11.7 |
| Answer» B. 4.68 | |
| 44. |
A 0.00022 F capacitor equals how many microfarads? |
| A. | 22 F |
| B. | 220 F |
| C. | 2,200 F |
| D. | 22,200 F |
| Answer» C. 2,200 F | |
| 45. |
In Question 6, the capacitor will reach full charge in a time equal to approximately |
| A. | 6 RC |
| B. | 5 RC |
| C. | RC |
| D. | none of the above |
| Answer» C. RC | |
| 46. |
A capacitor of 0.02 F is larger than |
| A. | 0.000020 F |
| B. | 200,000 pF |
| C. | 2,000 pF |
| D. | all of the above |
| Answer» D. all of the above | |
| 47. |
A 4.7 M resistor is in series with a 0.015 F capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge? |
| A. | 35 ms |
| B. | 352 ms |
| C. | 3.5 s |
| D. | 70.5 ms |
| Answer» C. 3.5 s | |
| 48. |
XC is inversely proportional to frequency and capacitance. |
| A. | 1 |
| B. | |
| C. | 1 |
| D. | |
| Answer» B. | |
| 49. |
What is the capacitance when Q = 60 C and V = 12 V? |
| A. | 720 F |
| B. | 5 F |
| C. | 50 F |
| D. | 12 F |
| Answer» C. 50 F | |
| 50. |
A 10 F, 20 F, 22 F, and 100 F capacitor are in parallel. The total capacitance is |
| A. | 2.43 F |
| B. | 4.86 F |
| C. | 100 F |
| D. | 152 F |
| Answer» E. | |