MCQOPTIONS
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MCQOPTIONS
This section includes 133 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
A battery is one type of power supply that converts chemical energy into electrical energy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 102. |
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. | |
| 103. |
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 | |
| 104. |
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 | |
| 105. |
In 0.025 W, there are |
| A. | 25 kW |
| B. | 0.00025 mW |
| C. | 2,500 µW |
| D. | 25 mW |
| Answer» E. | |
| 106. |
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 | |
| 107. |
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 | |
| 108. |
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 | |
| 109. |
The capacity of a battery is measured in milli-amperes. |
| A. | True |
| B. | False |
| Answer» C. | |
| 110. |
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 | |
| 111. |
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 | |
| 112. |
Energy is equal to power multiplied by voltage. |
| A. | True |
| B. | False |
| Answer» C. | |
| 113. |
The joule is a unit of energy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 114. |
In 40 kW, there are |
| A. | 0.4 mW |
| B. | 40,000 W |
| C. | 400 W |
| D. | 5,000 W |
| Answer» C. 400 W | |
| 115. |
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 | |
| 116. |
At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power? |
| A. | 1.286 kWh |
| B. | 12.85 kWh |
| C. | 535 kWh |
| D. | 252 kWh |
| Answer» B. 12.85 kWh | |
| 117. |
How much continuous current can be drawn from a 60 Ah battery for 14 h? |
| A. | 42.8 A |
| B. | 428 A |
| C. | 4.28 A |
| D. | 4.2 A |
| Answer» D. 4.2 A | |
| 118. |
A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is |
| A. | 8.57 % |
| B. | 42.85 % |
| C. | 4.28 % |
| D. | 85.7 % |
| Answer» E. | |
| 119. |
A 3.3 kΩ resistor dissipates 0.25 W. The current is |
| A. | 8.7 mA |
| B. | 87 mA |
| C. | 8.7 µA |
| D. | 8.7 A |
| Answer» B. 87 mA | |
| 120. |
Watt's law states the relationships of power to energy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 121. |
Energy equals power multiplied by time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 122. |
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 | |
| 123. |
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. | |
| 124. |
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. | |
| 125. |
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 | |
| 126. |
A students caries a bag weighing 5 kg from the ground floor to his class on the first floor that is 2 m high. The work done by the boy is |
| A. | 1 J |
| B. | 10 J |
| C. | 100 J |
| D. | 1000 J |
| Answer» D. 1000 J | |
| 127. |
How much time will be required to perform 520 J of work at the rate of 20 W? |
| A. | 24s |
| B. | 16s |
| C. | 20 s |
| D. | 26 s |
| Answer» E. | |
| 128. |
If the velocity of a body is doubled its kinetic energy |
| A. | gets doubled |
| B. | becomes half |
| C. | does not change |
| D. | becomes 4 times |
| Answer» E. | |
| 129. |
A ball is dropped from a height of 10 m. |
| A. | Its potential energy increases and kinetic energy decreases during the falls |
| B. | Its potential energy is equal to the kinetic energy during the fall. |
| C. | The potential energy decreases and the kinetic energy increases during the fal |
| D. | The potential energy is �0� and kinetic energy is maximum while it is falling. |
| Answer» D. The potential energy is �0� and kinetic energy is maximum while it is falling. | |
| 130. |
The gravitational potential energy of an object is due to |
| A. | its mass |
| B. | its acceleration due to gravity |
| C. | its height above the earth�s surface |
| D. | all of the above. |
| Answer» E. | |
| 131. |
The energy possessed by an oscillating pendulum of a clock is |
| A. | kinetic energy |
| B. | potential energy |
| C. | restoring energy. |
| D. | mechanical energy |
| Answer» E. | |
| 132. |
The spring will have maximum potential energy when |
| A. | it is pulled out |
| B. | it is compressed |
| C. | both (a) and |
| D. | neither (a) nor |
| Answer» D. neither (a) nor | |
| 133. |
The unit of work is joule. The other physical quantity that has same unit is |
| A. | power |
| B. | velocity |
| C. | energy |
| D. | force |
| Answer» D. force | |