AB is a potentiometer wire as shown in figure

cbse
current-electricity

#1

AB is a potentiometer wire as shown in figure. If the value of R is increased, in which direction will the balance point J shift?


#2

As, the value of R is increased, the current flowing in the circuit will decrease. And the potential gradient,
i. e. potential drop per unit length also decreases, so that the balance length will increase. Thus, J will shift towards B.