Energy and Power Multiple Choice Questions - Set 01 - ObjectiveBooks

Energy and Power Multiple Choice Questions - Set 01

Practice Test: Question Set - 01

1. 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

2. Energy is equal to power multiplied by voltage.
    (A) True
    (B) False

3. 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

4. When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is
    (A) Overheated
    (B) Shorted
    (C) Open
    (D) Reversed

5. The joule is a unit of energy.
    (A) True
    (B) False

6. In 40 kW, there are
    (A) 0.4 mW
    (B) 40,000 W
    (C) 400 W
    (D) 5,000 W

7. 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

8. The watt is the unit of power.
    (A) True
    (B) False

9. 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

10. 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

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