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This section includes 12 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. |
What happens to the capacitance when the voltage across the capacitor increases? |
A. | Decreases |
B. | Increases |
C. | Becomes 0 |
D. | No effect |
Answer» E. | |
2. |
Calculate the capacitance of a capacitor that stores 40microC of charge and has a voltage of 2V. |
A. | 20F |
B. | 20microF |
C. | 10F |
D. | 10microF |
Answer» C. 10F | |
3. |
What is the voltage across the capacitor if the switch is closed and steady state is reached? |
A. | 8V |
B. | 0V |
C. | 10V |
D. | Infinity |
Answer» D. Infinity | |
4. |
WHAT_HAPPENS_TO_THE_CAPACITANCE_WHEN_THE_VOLTAGE_ACROSS_THE_CAPACITOR_INCREASES??$ |
A. | Decreases |
B. | Increases |
C. | Becomes 0 |
D. | No effect |
Answer» B. Increases | |
5. |
Calculate the capacitance of a capacitor that stores 40microC of charge and has a voltage of 2V? |
A. | 20F |
B. | 20microF |
C. | 10F |
D. | 10microF |
Answer» C. 10F | |
6. |
What happens to the current flow in a fully charged capacitor? |
A. | Current flow stops |
B. | Current flow doubles |
C. | Current flow becomes half its original value |
D. | Current flow becomes one-fourth its original value |
Answer» B. Current flow doubles | |
7. |
When will capacitor fully charged? |
A. | When the voltage across its plates is half the voltage from ground to one of its plates |
B. | When current through the capacitor is a 1/root2 time its value |
C. | When the supply voltage is equal to the capacitor voltage |
D. | Never |
Answer» D. Never | |
8. |
When the voltage across a capacitor increases, what happens to the charge stored in it? |
A. | Increases |
B. | Decreases |
C. | Becomes zero |
D. | Cannot be determined |
Answer» B. Decreases | |
9. |
If one plate of a parallel plate capacitor is charged to positive charge the other plate is charged to? |
A. | Positive |
B. | Negative |
C. | Positive or negative |
D. | Not charged |
Answer» C. Positive or negative | |
10. |
What is the voltage across a capacitor at the time of switching, that is, when t=0? |
A. | Infinity |
B. | 0V |
C. | Cannot be determined |
D. | 1V |
Answer» C. Cannot be determined | |
11. |
If a 2F capacitor has 1C charge, calculate the voltage across its terminals. |
A. | 0.5V |
B. | 2V |
C. | 1.5V |
D. | 1V |
Answer» C. 1.5V | |
12. |
Which among the following expressions relate charge, voltage and capacitance of a capacitor? |
A. | Q=C/V |
B. | Q=V/C |
C. | Q=CV |
D. | C=Q2V |
Answer» D. C=Q2V | |