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A-LevelPhysicsElectric fields9702/12 · May/June 2017 · Q311 Mark

The path of an electron with initial speed v in the uniform electric field between two parallel plates is shown. [Figure shows an electron entering horizontally between two horizontal parallel plates, being deflected downwards by an electric field. The vertical deflection at the right-hand edge is labelled x.] The vertical deflection x is measured at the right-hand edge of the plates. The distance between the plates is halved. The potential difference between the plates remains the same. What will be the new deflection of the electron with the same initial speed 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.

Ax
B√2 x
C2x
D4x

✓ Correct answer

C: 2x

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About this question

Topic
Electric fields, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source
A-Level Physics, May/June 2017 Paper 1 Variant 2, question 31.

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