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Potentiometer

AB is a wire ...

Question

AB is a wire of potentiometer with the increase in the value of resistance R, the shift in the balance point J will be.

A

Towards B

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B

Towards A

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C

Remains constant

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D

First towards B then back towards A

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Solution

The correct option is A Towards B
As the resistance of the wire will increase, it will lead to the decrease in the current in the wire. Since the current decreases, the potential gradient of the wire will also decrease and due to this, the length of the balancing point will also increase.

Therefore, the point J will shift towards the point B.

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