Question

It is claimed that the strips S and S¹ serve two purposes I. to decide the end points of the wire and II. To keep the wires in place, then 

(a)  both I and II are important 

(b)  I is more important than II 

(c)  II is more important than I 

(d)  both are equally important

Answer 1

Correct option  (b) I is more important than II

Explanation:

When the end points of the wire are known accurately, the readings of the potentiometer will be trustworthy. So it is more important to decide the end points of the wire than to keep the wires in place.