If each of the resistance in the network in figure `R`,
the equivalent resistance between terminals `A` and `B` is

Options

A. R
B. 5R
C. 3R
D. 6R

Answer

A

Explanation

Thee quivalent circuitis shown in fig.Since the Wheat stone’s bridge is balanced, therefore no current will flowthrough the arm KL.Equivalent resistance between
AKM=R+ R= 2R
Equivalent resistance between ALM = R +
equivalent resistance between A and B is given by

`(1)/(R) = (1)/(2R) +(1)/(2R) = (2)/(2R) = (1)/(R)`
`i.e., R =R`