DP Physics (last assessment 2024)

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Question 22M.1.HL.TZ1.32

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.HL.TZ1.32
Level HL Paper 1 Time zone TZ1
Command term Question number 32 Adapted from N/A
32.
[Maximum mark: 1]
22M.1.HL.TZ1.32

A charged sphere in a gravitational field is initially stationary between two parallel metal plates. There is a potential difference V between the plates.

Three changes can be made:

I.   Increase the separation of the metal plates
II.  Increase V
III. Apply a magnetic field into the plane of the paper

What changes made separately will cause the charged sphere to accelerate?

A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III

[1]

Markscheme

A

Examiners report

Option C was a very successful distractor, selected by the majority of candidates. Most candidates missed that change III ("Apply a magnetic field into the plane of the paper") can never be correct if the charge is stationary.

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