DP Physics (first assessment 2025)

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Question 22M.1A.HL.TZ1.38

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.HL.TZ1.38
Level HL Paper 1A Time zone TZ1
Command term Question number 38 Adapted from N/A
38.
[Maximum mark: 1]
22M.1A.HL.TZ1.38

Light with photons of energy 8.0 × 10−20 J are incident on a metal surface in a photoelectric experiment.

The work function of the metal surface is 4.8 × 10−20 J . What minimum voltage is required for the ammeter reading to fall to zero?

A.  0.2 V

B.  0.3 V

C.  0.5 V

D.  0.8 V

[1]

Markscheme

A

Examiners report

Options B and C were both effective distractors in this photoelectric effect question. There was a heightened number of blanks (no response) relative to the questions immediately before and after, and the low difficulty index suggests that candidates found this question challenging.

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