Practice electric power MCQs in physics quiz for test prep. Current electricity quiz questions has multiple choice questions (MCQ) with electric power test, answers as if we double both current and voltage keeping resistance constant then power is, answer key with choices as unchanged, halves, doubles and quadruples for competitive exam preparation worksheets. Free physics revision notes to learn electric power quiz with MCQs to find questions answers based online tests.

MCQ. If we double both current and voltage keeping resistance constant then power is

1. unchanged
2. halves
3. doubles

D

MCQ. If a light bulb is switched on for 20 s and it consumes 2400 J of electrical energy then it's power is

1. 60 W
2. 70 W
3. 80 W
4. 90 W

A

MCQ. Amount of energy supplied by current in unit time is called

1. electric energy
2. friction
3. resistance
4. Electric power

D

MCQ. If resistance of an electric bulb is 500 Ω and voltage across its ends is 250 V then power consumed by it is

1. 130 W
2. 125 W
3. 120 W
4. 200 W

B