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The potential difference between A and B...

The potential difference between A and B is V. The values of some resistances are shown. The other resistance are equal in values. What should be the value of each of these resistances so that current in circuit is `V//3R`.

A

`R//3`

B

R

C

`R//6`

D

3R

Text Solution

Verified by Experts

The correct Answer is:
D
d. `R_(eq) = V/I = (V xx 3R)/V = 3R`
Hence equivalent resistance of three parallel resistances should
be `3R - 2R = R`
`1/R = 1/x + 1/x + 1/x`
or `x/3 = R or x = 3R`
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