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The incandescent bulbs respectively as P1 and P2 for operation at a specified main voltage are connected in series across the mains as shown in the figure, then the total power supplied by the mains to the two bulbs—
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P1 P2 P1 + P2 - P2 1 + P2 2
- (P1 + P2)
- P1 × P2
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Correct Option: D
Since the bulbs are connected in series
so, P1 = I1 2 R1
P2 = I1 2 R2
Total power supplied
(P) = I1 2 (R1 + R2) = P1 + P2
