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

Explanation

With the increase of R, the current in main circuit decreases which in turn, decreases the potential difference across AB and hence potential gradient (k) across AB decreases. Since, at neutral point, for given emf of cell, I increases as potential gradient (k) across AB has decreased because.
`E=kI` ltBrgt thus, with the increase of I, the balance point neutral point will shift towards B.