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Question

Four 2 ohm resistors are connected together along the edges of a square. A 10V battery of negligible internal resistance is connected across a pair of the diagonally opposite corners of the square. The power dissipated in the circuit is

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A
100 W
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B
50W
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C
25W
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D
20W
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Solution

The correct option is B 50W
Power dissipated in circuit =E2Reff
Reff=4×42×4=2Ω
P=10×102=50W

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