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A current of 2amp is flowing in the prim...

A current of 2amp is flowing in the primary circuit of a potentiometer wire having resistance of `0.2 ohm//m`. In a coil when current of 1A flows, then potential difference across its terminals are balanced at 2.5m of the potentiometer wire. The resistance of the coil is

A

1 ohm

B

2.5 ohm

C

0.4 ohm

D

5.0 ohm

Text Solution

Verified by Experts

The correct Answer is:
A
`1xxR =2xx0.2 xx2.5 rArr R=1 Omega`
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