Question

(i)
If the length of a potentiometer wire is increased by keeping
constant potential difference across the wire, then
(a) null point is obtained at larger distance
(b) there is no change in the null point
(C) potential gradient is increased
(d) null point is obtained at shorter distance​

Answer 1

Answer:

null point is obtained at larger distance

Answer 2

If the length of the potentiometer wire is increased, the null point will be obtained at larger distance.

Explanation:

• When the length of the potentiometer wire is increased, the null point will shift beyond the length of the wire.
• This happens when the potential gradient of the wire decreases with the increase in the length of the wire.
• The length of the wire is dependent on the potential gradient and the and the difference in the voltage flowing across the wire.

To know more:

1) What is null point ?

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2) What is null point in Physics.....

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