MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
An engine uses 30 A of current. The resistance offered is 15 ohms. Calculate the power consumed by the engine in horse power. |
| A. | 18 hp |
| B. | 19 hp |
| C. | 17 hp |
| D. | 13500 hp |
| Answer» B. 19 hp | |
| 2. |
One watt is equal to __________ |
| A. | one kilowatt per second |
| B. | one kilo joule per second |
| C. | one joule per second |
| D. | one joule per minute |
| Answer» D. one joule per minute | |
| 3. |
The power consumed by a 300 V bulb, having a resistance of 100 ohms, is 3 Watts. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Which one of the following is the practical unit of power? |
| A. | Watt (W) |
| B. | Kilowatt hour (kWh) |
| C. | Horse power (hp) |
| D. | Kilojoule (kJ) |
| Answer» D. Kilojoule (kJ) | |
| 5. |
Identify the correct formula of electric power. |
| A. | Electric power = \(\frac {time \, taken}{electric \, work \, done}\) |
| B. | Electric power = \(\frac {electric \, work \, done}{time \, taken}\) |
| C. | Electric power = electric work done × time taken |
| D. | Electric power = \(\frac {1}{electric \, work \, done}\) |
| Answer» C. Electric power = electric work done × time taken | |
| 6. |
Kabir bought 5 new light bulbs of 50 W each in addition to the 7 bulbs he already had in his house which were also 50 W each. Calculate his electricity bill, if he keeps the new bulbs on for 5 hours and the older bulbs on only for 3 hours, and the cost of one unit of electricity is Rs. 60. |
| A. | Rs.136 |
| B. | Rs.137 |
| C. | Rs.138 |
| D. | Rs.139 |
| Answer» D. Rs.139 | |
| 7. |
Electric energy is dependent on time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Calculate the number of units of electricity used if a bulb of 100 W is kept on for 5 hours. |
| A. | 1 unit |
| B. | 0.1 unit |
| C. | 5 unit |
| D. | 0.5 unit |
| Answer» E. | |
| 9. |
1 kWh = ___________ |
| A. | 3.6 × 106 J |
| B. | 3.6 × 105 J |
| C. | 0.36 × 106 J |
| D. | 0.36 × 105 J |
| Answer» B. 3.6 × 105 J | |
| 10. |
The SI unit of electrical energy is ____________ |
| A. | kilojoule (KJ) |
| B. | joules (J) |
| C. | watt (W) |
| D. | kilowatt (KW) |
| Answer» C. watt (W) | |