calculate the total power of the circuit of 2 lamps rated as 200 watt / 240 volt are connected in series across 240 volt supply
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Since the two bulbs have the same ratings, so 240V will be equally divide into two voltages of 120V each. Now current through the circuit is I=Power/Voltage=200/120=1.67A. Now the total power= Total supplied voltage * line current (current is same because it is a series connection) = 240*1.67=400W
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