MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
In ac circuit, resistance 5 ohm is connected with a capacitor having capacitive reactance 12 ohm. Supply of 260 V is connected to the circuit. Calculate the voltage across a capacitor. |
| A. | 300 V |
| B. | 200 V |
| C. | 240 V |
| D. | 100 V |
| Answer» D. 100 V | |
| 2. |
In ac circuit, resistance 5 ohm is connected with capacitor having capacitive reactance 12 ohm. Supply of 260 V is connected to the circuit. Calculate the voltage across resistance. |
| A. | 300 V |
| B. | 200 V |
| C. | 240 V |
| D. | 100 V |
| Answer» E. | |
| 3. |
In ac circuit, resistance 5 ohm is connected with capacitor having capacitive reactance 12 ohm. Supply of 260 V is connected to the circuit. Calculate the current in the circuit. |
| A. | 40 A |
| B. | 10 A |
| C. | 20 A |
| D. | 30 A |
| Answer» D. 30 A | |
| 4. |
If in an alternating current circuit, capacitance C is connected to a supply of 200V,50Hz. Current in the circuit is 1.89 A. Find the capacitance C. |
| A. | 30 µF |
| B. | 20 µF |
| C. | 10 µF |
| D. | 15 µF |
| Answer» B. 20 µF | |
| 5. |
If in an alternating current circuit, capacitance of 30 µF is connected to a supply of 200V,50Hz. Find the current in the circuit. |
| A. | 1.38 A |
| B. | 1.89 A |
| C. | 1.74 A |
| D. | 0.89 A |
| Answer» B. 1.89 A | |
| 6. |
If in an alternating current circuit, impedance is 26 ohm, capacitive reactance is 24 ohm, what is the resistance? |
| A. | 25 ohm |
| B. | 10 ohm |
| C. | 12 ohm |
| D. | 23 ohm |
| Answer» C. 12 ohm | |
| 7. |
If in an alternating current circuit, resistance is 5 ohm, capacitive reactance is 12 ohm, what is the impedance? |
| A. | 5 ohm |
| B. | 10 ohm |
| C. | 12 ohm |
| D. | 13 ohm |
| Answer» E. | |
| 8. |
At DC, inductor acts as ___________ |
| A. | Open circuit |
| B. | Short circuit |
| C. | Resistor |
| D. | Inductor |
| Answer» C. Resistor | |
| 9. |
The expression for current in an RC circuit is? |
| A. | i=(V/R)e<sup>(t/RC)</sup> |
| B. | i=(V/R)e<sup>(-t/RC)</sup> |
| C. | i=(V/R)/e<sup>(t/RC)</sup> |
| D. | i=(V/R)/e<sup>(-t/RC)</sup> |
| Answer» C. i=(V/R)/e<sup>(t/RC)</sup> | |
| 10. |
At DC, the capacitor acts as? |
| A. | Open circuit |
| B. | Short circuit |
| C. | Resistor |
| D. | Inductor |
| Answer» B. Short circuit | |
| 11. |
An RC network is one which consists of? |
| A. | Resistor and capacitor in parallel |
| B. | Resistor and capacitor in series |
| C. | Resistor and inductor in parallel |
| D. | Resistor and inductor in series |
| Answer» C. Resistor and inductor in parallel | |
| 12. |
For an RC circuit, the phase angle is always ________ |
| A. | Positive |
| B. | Negative |
| C. | 0 |
| D. | 90 |
| Answer» B. Negative | |
| 13. |
Which, among the following is the correct expression for φ?$ |
| A. | φ=tan<sup>-1</sup>(Xc/R) |
| B. | φ=tan<sup>-1</sup> (R/Xc) |
| C. | φ=tan<sup>-1</sup> (Xc*R) |
| D. | φ=cos<sup>-1</sup> (Xc/R) |
| Answer» B. ‚âà√¨‚àö√∫=tan<sup>-1</sup> (R/Xc) | |
| 14. |
In an RC series circuit ________ |
| A. | Applied voltage lags capacitor voltage |
| B. | Applied voltage leads capacitor voltage |
| C. | Current and voltage are in phase |
| D. | Applied voltage and capacitive voltage are in phase |
| Answer» C. Current and voltage are in phase | |