What would be the total power drawn from the supply, when two heaters, rated at 1000 W, 250 V each are connected in series across a 250 V, 50 Hz supply? 

(A) 1000 W (B) 500 W (C) 250 W (D) 2000 W
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Answer:B.


One heater 1000W, 250V resistance is 62.5ohm.
Two Series connected heaters so, 62.5+62.5=125ohm.
Current in the series circuit is 250V/125ohm = 2A.
Total power drawn = current2 X R = 22 x 125 = 500W.
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