MCQOPTIONS
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MCQOPTIONS
This section includes 27 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. |
Power rating is related to resistance value.~! |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
The power rating of a resistor determines the minimum power that it can handle safely.~! |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
A resistor normally opens when it burns out.~! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The watt is the unit of power.~! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is%! |
| A. | 0.58 Ah |
| B. | 2.1 Ah |
| C. | 21 Ah |
| D. | 58 Ah |
| Answer» D. 58 Ah | |
| 6. |
Energy is equal to power multiplied by voltage.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
The joule is a unit of energy.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
In 40 kW, there are%! |
| A. | 0.4 mW |
| B. | 40,000 W |
| C. | 400 W |
| D. | 5,000 W |
| Answer» C. 400 W | |
| 9. |
A half-watt is equal to how many milliwatts?%! |
| A. | 5,000 mW |
| B. | 5 mW |
| C. | 500 mW |
| D. | 50 mW |
| Answer» D. 50 mW | |
| 10. |
Energy equals power multiplied by time.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
A 120 Ω resistor must carry a maximum current of 25 mA. Its rating should be at least%! |
| A. | 4.8 W |
| B. | 150 mW |
| C. | 15 mW |
| D. | 480 mW |
| Answer» C. 15 mW | |
| 12. |
A battery is one type of power supply that converts chemical energy into electrical energy.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
How many watt-hours represent 65 W used for 18 h?%! |
| A. | 11.7 Wh |
| B. | 1,170 Wh |
| C. | 11,700 Wh |
| D. | 117,000 Wh |
| Answer» C. 11,700 Wh | |
| 14. |
If it takes 400 ms to use 12,000 J of energy, the power is%! |
| A. | 30 kW |
| B. | 30 W |
| C. | 3 W |
| D. | 300 kW |
| Answer» B. 30 W | |
| 15. |
A 33 Ω half-watt resistor and a 330 Ω half-watt resistor are connected across a 12 V source. Which one(s) will overheat?%! |
| A. | 33 Ω |
| B. | 330 Ω |
| C. | Both resistors |
| D. | Neither resistor |
| Answer» E. | |
| 16. |
For 12 V and 40 mA, the power is%! |
| A. | 480 mW |
| B. | 0.480 W |
| C. | 480,000 µW |
| D. | All of the above |
| Answer» E. | |
| 17. |
A 15 V source is connected across a 12 Ω resistor. How much energy is used in three minutes?%! |
| A. | 938 Wh |
| B. | 0.938 Wh |
| C. | 56.25 Wh |
| D. | 5.6 Wh |
| Answer» C. 56.25 Wh | |
| 18. |
A 68 Ω resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is%! |
| A. | 132 mW |
| B. | 13.2 mW |
| C. | 22.6 mW |
| D. | 226 mW |
| Answer» B. 13.2 mW | |
| 19. |
If you used 400 W of power for 30 h, you have used%! |
| A. | 1.3 kWh |
| B. | 13.3 kWh |
| C. | 1.2 kWh |
| D. | 12 kWh |
| Answer» E. | |
| 20. |
The capacity of a battery is measured in milli-amperes.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 21. |
Three hundred joules of energy are consumed in 15 s. The power is%! |
| A. | 2,000 W |
| B. | 2 W |
| C. | 20 W |
| D. | 200 W |
| Answer» D. 200 W | |
| 22. |
A 220 Ω resistor dissipates 3 W. The voltage is%! |
| A. | 73.3 V |
| B. | 2.5 V |
| C. | 25.7 V |
| D. | 257 V |
| Answer» D. 257 V | |
| 23. |
A 6 V battery is connected to a 300 Ω load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?%! |
| A. | 1 h |
| B. | 200 h |
| C. | 2,000 h |
| D. | 10 h |
| Answer» D. 10 h | |
| 24. |
In 0.025 W, there are%! |
| A. | 25 kW |
| B. | 0.00025 mW |
| C. | 2,500 µW |
| D. | 25 mW |
| Answer» E. | |
| 25. |
*/*_When the current through a 12 kΩ resistor is 8 mA, the power is? |
| A. | 7.68 mW |
| B. | 768 mW |
| C. | 7.68 W |
| D. | 76.8 W |
| Answer» C. 7.68 W | |
| 26. |
_ A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume?$? |
| A. | 20.16 kWh |
| B. | 201.6 kWh |
| C. | 2.01 kWh |
| D. | 8.4 kWh |
| Answer» C. 2.01 kWh | |
| 27. |
A 75 Ω load uses 2 W of power. The output voltage of the power supply is approximately$? |
| A. | 120 V |
| B. | 1.2 V |
| C. | 12 V |
| D. | 6 V |
| Answer» D. 6 V | |