A-LevelPhysicsElectric fields9702/12 · Oct/Nov 2018 · Q321 Mark
Two parallel metal plates are connected to a d.c. supply, as shown. [Figure 32.1] The two plates are moved towards each other at constant speed. It may be assumed that the electric field between the plates is uniform. Point P is mid-way between the two plates. Which graph shows the variation with time t of the electric field strength E at point P?
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 electric field strength E decreasing with time t in a concave up curve.
Bgraph showing electric field strength E increasing with time t in a concave up curve.
Cgraph showing electric field strength E constant with time t.
Dgraph showing electric field strength E increasing with time t in a concave down curve.
✓ Correct answer
D: graph showing electric field strength E increasing with time t in a concave down curve.
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