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Question

In the network shown in the figure each of resistance is equal to 2Ω. The resistance between A and B is

A
1Ω
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B
2Ω
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C
3Ω
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D
4Ω
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Solution

The correct option is B 2Ω


Taking the portion COD is figure to outside the triangle (left), the above circuit will be now as resistance of each is 2Ω the circuit will behaves as a balanced wheatstone bridge and no current flows through CD. Hence RAB=2Ω

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