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A potentiometer wire of 10 m length and ...

A potentiometer wire of 10 m length and 20 ohm resistance is connected in series with a resistance R ohms and a battery of emf 2V, negligible internal resistance, potential gradient on the wire is 0.16 millivolt/centimetre then R is ohm….

A

`50 ohms`

B

`60 ohms`

C

`230 ohms`

D

`46 ohms`

Text Solution

Verified by Experts

The correct Answer is:
C
`v = i(rho)l`
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