In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire '…

In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire ' $x$ ' $\mathrm{cm}$ long. If length of potentiometer wire is increased by few centimeters without changing the cell, the balancing length will [Driving source is not changed]
  1. will not change
  2. increase
  3. decrease
  4. become zero

Solution

If the length of potentiometer wire increase, the potential gradient will decrease. Hence to balance the same p.d., the length will increase. ~

Asked in: MHT CET 2021 (20 Sep Shift 1)

Practice more Current Electricity questions on Aicharya