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Q.

A wire of resistance 0.1 ohm cm–1 bent to form a square ABCD of side 10 cm. A similar wire is connected between the corners B and D to form the diagonal BD. Find the effective resistance of this combination between corners A and C. If a 2V battery of negligible internal resistance is connected across A and C, calculate the total power dissipated.

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a

2Ω  , 4 W

b

1Ω,3W

c

1  Ω, 4 W

answer is B.

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