Question

Potentiometer measures the potential difference more accurately than a voltmeter, because ______.

Options

• It has a wire of low resistance.

• It does not draw current from external circuit.

• It draws a heavy current from external circuit.

• It has a wire of high resistance.

Answer 1

Potentiometer measures the potential difference more accurately than a voltmeter because it does not draw current from external circuit.

Explanation:

Potentiometers use the null deflection method to measure potential differences, which means no current is pulled from the cell, whereas voltmeters require a tiny current to demonstrate deflection. As a result, a potentiometer is used to accurately measure p.d.