Question

A potentiometer is connected to a cell through switch in series. To one end of the potentiometer is attached a voltmeter with the help of connecting wire and a jockey. When the jockey is moved over the potentiometer wire from zero end to 100 cm the reading shown by voltmeter is likely to:

Options

• decrease

• increase

• not change

• none of these

Answer 1

Increase

Explanation:

The potential difference along a uniform potentiometer wire increases with the length of wire considered. Moving the jockey from the zero end towards 100 cm therefore increases the voltmeter reading.