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ABCD is a square of side 'a' metres and ...

ABCD is a square of side 'a' metres and is made of wires of resistance x ohms/metre. Similar wires are connected across the diagonals AC and BD. The effective resistance between the corners A and C will be

A

`(2-sqrt2)ax`

B

6ax

C

3ax

D

`(2+sqrt2)ax`

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The correct Answer is:
A
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