Question

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

Options

• towards B

• towards A

• remains constant

• first towards B then back towards A

Answer 1

towards B

Explanation:

As the resistance R increases, the current across the wire reduces, and the potential gradient falls as well, resulting in an increase in balancing length. So J will move closer to B.