In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire 
long. If the length of the potentiometer wire is increased without changing the cell, the balancing length will (Driving source is not changed)
Text Solution
Verified by ExpertsThe correct answer is:
A
When the length of potentiometer wire is increased without changing the cell, its potential gradient decreases.
As, 
For the same cell, if potential gradient 
decreases, balancing length 
increases.
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