Question

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:

d

Explanation:

P.G= V/L

Potential gratiant is inversially proportion to length

Answer 2

If the length of a potentiometer wire is increased the null point is obtained at shorter distance

• If the length of potentiometer wire decreases,the potential gradient decreases as it inversly propotional to it

• As the potential gradient decreases the balance point would be obtained at shorter distance

• This can be also proved by formula Potential gradient= V/L

• From the formula we can see that potential gradient is inversly proportional to length