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A nichrome wire AB, 100 cm long and of u...

A nichrome wire AB, 100 cm long and of uniform cross section cross section is mounted on a meter scale the points A and B coinciding with 0 cm and 100 cm marks respectively. The wire has a resistance S = 50 ohm, Ay point C along this wire, between A and B is called a variable point to which on end of and electrical element is commeted. In the following questions this arrangement will be referred to as 'wire AB'.
The emf of a battery is determined using the following circuit with 'wire AB'. The galvanometer shows zero delfection when one of its terminals is conneted to point C. If the internal resistance of the battery is 4 ohm, its emf is

A

3.75 volt

B

4.05 volt

C

2.05 volt

D

9.0 volt

Text Solution

Verified by Experts

The correct Answer is:
B
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