A-LevelPhysicsD.C. circuits9702/12 · Feb/Mar 2021 · Q381 Mark
A battery is connected to a potentiometer. The potentiometer consists of a uniform resistance wire and a sliding contact P. [Figure 38.1] 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?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Agraph showing V increasing linearly with d from the origin.
Bgraph showing V increasing non-linearly with d from the origin (curving upwards).
Cgraph showing V decreasing linearly with d.
Dgraph showing V decreasing non-linearly with d (curving downwards).
✓ Correct answer
A: graph showing V increasing linearly with d from the origin.
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill D.C. circuits and see which topics are most likely to come up next.
Sign up free →