Physics (AS & A Level) · Feb / March 2021 · Paper 12 · Question 38

A battery is connected to a potentiometer. The potentiometer consists of a uniform resistance wire and a sliding contact P. The potential difference (p.d.) V between the sliding contact P and end Q of the wire is measured using a voltmeter. The sliding contact P is moved from end Q to end R of the wire. Sliding contact P is distance d from Q. Which graph shows the variation with distance d of the p.d. V ?

1. Agraph A
2. Bgraph B
3. Cgraph C
4. Dgraph D

As printed in the paper