Two incandescent bulbs rated respectively as P1 and P2 for operation at a specified main voltage are connected in series across the mains. The total power supplied by the mains to the two bulbs will be:

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TuteeHUB · Accepted Answer

$\sqrt {{P_1} \times {P_2}} $

TuteeHUB · Answer

$ \frac{{{P_1}{P_2}}}{{{P_1} + {P_2}}}$

TuteeHUB · Answer

$\sqrt {P_1^2 \times P_2^2} $

TuteeHUB · Answer

P1 + P2

1.	Two incandescent bulbs rated respectively as P1 and P2 for operation at a specified main voltage are connected in series across the mains. The total power supplied by the mains to the two bulbs will be:
A.	\( \frac{{{P_1}{P_2}}}{{{P_1} + {P_2}}}\)
B.	\(\sqrt {{P_1} \times {P_2}} \)
C.	\(\sqrt {P_1^2 \times P_2^2} \)
D.	P1 + P2
Answer» B. \(\sqrt {{P_1} \times {P_2}} \)

Two incandescent bulbs rated respectively as P1 and P2 for operation at a specified main voltage are connected in series across the mains. The total power supplied by the mains to the two bulbs will be:

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