MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the value of the peak current, if the rms value of current in an ac circuit is 50 A? |
| A. | 70.7 A |
| B. | 65 A |
| C. | 50 A |
| D. | 1 A |
| Answer» B. 65 A | |
| 2. |
Which value of the current do you measure with an a.c. ammeter? |
| A. | Instantaneous current |
| B. | Root mean square value |
| C. | Electromotive force |
| D. | Peak current |
| Answer» C. Electromotive force | |
| 3. |
When a sinusoidal voltage E = 200 sin 314 t is applied to a resistor of 10 resistance, the power dissipated is 250 Watts. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Find out the net power consumed over a full cycle, if a 150 resistor is connected to a 350 V, 100 Hz ac supply. |
| A. | 2.3 W |
| B. | 350 W |
| C. | 805 W |
| D. | 500 W |
| Answer» D. 500 W | |
| 5. |
Calculate the rms voltage, if the peak value of an a.c. supply is 300 V. |
| A. | 561.4 V |
| B. | 969.2 V |
| C. | 625.1 V |
| D. | 212.1 V |
| Answer» E. | |
| 6. |
Determine the rms value of current in the circuit if a 50 resistor is connected across an ac source of 200 V, 50 Hz? |
| A. | 4 A |
| B. | 200 A |
| C. | 50 A |
| D. | 1 A |
| Answer» B. 200 A | |
| 7. |
What will be the rms value of the voltage, if the sinusoidal value voltage is given as E = 100 sin 314 t applied across a resistor of resistance 15 ohms? |
| A. | 200 V |
| B. | 70.71 V |
| C. | 100 V |
| D. | 33.87 V |
| Answer» C. 100 V | |
| 8. |
What is the rms value of the current, if its instantaneous current value is 8 sin314 t? |
| A. | 2 4 A |
| B. | 10 A |
| C. | 4 2 A |
| D. | 50 A |
| Answer» D. 50 A | |