A wire of resistance R is bent to form a...

A wire 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

`3/4 R`

B

R

C

`1/16 R`

D

`7/64` R

Verified by Experts

The correct Answer is:

D

`rArr 1/R_(eq) = 8/(7R) + 8/R`
`rArr 1/R_(eq) = 64/(7R) rArr R_(eq) = (7R)/64`

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