Question

why should not the jockey be slided along the potentiometer wire​

Answer 1

Answer:

Because the rubbing of wire with jockey can change the uniformity of the cross sectional area of the wire and thereby affecting the fall of potential along with the wire. jockey should not be rubbed against potentiometer wire as it wil affect the cross sectional area of wire and hence final readings will get affected.

Answer 2

Answer:

Because the rubbing of wire with jockey can change the uniformity of the cross sectional area of the wire and thereby affecting the fall of potential along with the wire. jockey should not be rubbed against potentiometer wire as it wil affect the cross sectional area of wire and hence final readings will get affected