An electric bulb rated for 500 watts at 100 volts is used in a circuit – InterviewSolution

1.	An electric bulb rated for 500 watts at 100 volts is used in a circuit having a 200-volt supply. The resistance R that must be put in series with the bulb, so that the bulb draws 500 watts is (a) 10 Ω(b) 20 Ω (c) 50 Ω (d) 100 Ω
Answer» Correct Answer is: (b) 20 Ω

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