MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find out the rms value of current in the circuit wherein a 35 mH inductor is connected to 200 V, 70 Hz ac supply. |
| A. | 13 A |
| B. | 15 A |
| C. | 20 A |
| D. | 45 A |
| Answer» B. 15 A | |
| 2. |
Determine the peak current if an inductor of inductance 500 mH is connected to an ac source of peak emf 650 V and frequency 100 Hz |
| A. | 1.55 A |
| B. | 2.07 A |
| C. | 7.89 A |
| D. | 9.87 A |
| Answer» C. 7.89 A | |
| 3. |
The inductive reactance for an ac circuit containing only an inductor is ( frac {E_0}{X_L} ). |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Why does an inductor offer an easy path to dc and a resistive path to ac? |
| A. | X<sub>L</sub> is maximum for dc and infinite for ac |
| B. | X<sub>L</sub> is zero for dc and infinite for ac |
| C. | X<sub>L</sub> is zero for dc and finite for ac |
| D. | X<sub>L</sub> is maximum for dc and finite for ac |
| Answer» D. X<sub>L</sub> is maximum for dc and finite for ac | |
| 5. |
At what frequency will a coil, which has an inductance of 2.5 H, have a reactance of 3500 ? |
| A. | 700Hz |
| B. | 350 Hz |
| C. | 200 Hz |
| D. | 223 Hz |
| Answer» E. | |
| 6. |
The frequency of ac is doubled. How does XL get affected? |
| A. | X<sub>L</sub> gets doubled |
| B. | X<sub>L</sub> becomes zero |
| C. | X<sub>L</sub> is halved |
| D. | X<sub>L</sub> is indefinite |
| Answer» B. X<sub>L</sub> becomes zero | |
| 7. |
In which type of circuit the value of power factor will be minimum? |
| A. | Resistive |
| B. | Inductive |
| C. | Superconductive |
| D. | Semi conductive |
| Answer» C. Superconductive | |