Question

A cell in secondary circuit gives null deflection for 2.5cm length of potentiometer having 10m long wire.If the length of the potentiometer wire is increased by 1m without charging the cell in primary circuit. Now the position of null point is a) 3.5m b) 3.0m c) 2.75m d) 2.0m​

Answer 1

Answer:

b is your answer of this question