Current Electricity and Electrical InstrumentHard

Question

A 50 Ω bulb is in series with a room heater and the combination is connected across the mains. To get max. heater output, the 50 Ω bulb should be replaced by

Options

A.25 W
B.10 W
C.100 W
D.200 W

Solution


For power across heater is maximum resistance of balb should be minimum.
Pheader = RH
Rbulb is minimum for 200 W.

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