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In given figure, the potentiometer wire ...

In given figure, the potentiometer wire AB has a resistance of `5 Omega` and length 10 m . The balancing length AM for the emf of 0.4 V is

A

0.4 m

B

4 m

C

0.8 m

D

8 m

Text Solution

Verified by Experts

The correct Answer is:
D
`I = 5/(45 + 5) = 1/10 A`
`V = (1/10) 5/10 xx l = 0.4 = 5/100 l rArr 5l = 40 m`
l = 8 m
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