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0. An electric bulb rated for 500 W at 100 V is used in a circuit having a 200 V supply. The resistance 'R' that must be kept in series with the bulb so that the bulb draws 500 W is (NTSE Andhra Pradesh, Stage-I, 2015-16)
30 Ω
5 Ω
10 Ω
20 Ω
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