A write of resistance R is bent to form ...

A write of resistance R is bent to form a square ABCD as shown in the figure. The effective resistance between E and C is :
(E is mid-point of arm CD)

A

R

B

`(7)/(64)R`

C

`(3)/(4)R`

D

`(1)/(16)R`

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The correct Answer is:

A

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