DP Physics (last assessment 2024)

Test builder »

Question 21M.2.HL.TZ2.c

Select a Test
Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.HL.TZ2.c
Level HL Paper 2 Time zone TZ2
Command term Calculate Question number c Adapted from N/A
c.
[Maximum mark: 2]
21M.2.HL.TZ2.c

In an experiment to demonstrate the photoelectric effect, monochromatic electromagnetic radiation from source A is incident on the surfaces of metal P and metal Q. Observations of the emission of electrons from P and Q are made.

The experiment is then repeated with two other sources of electromagnetic radiation: B and C. The table gives the results for the experiment and the wavelengths of the radiation sources.

Photons with energy 1.1 × 10−18 J are incident on a third metal surface. The maximum energy of electrons emitted from the surface of the metal is 5.1 × 10−19 J.

Calculate, in eV, the work function of the metal.

[2]

Markscheme

5.1×10-19=1.1×10-18-ϕ ✓

work function = «(11.0-5.1)×10-191.6×10-19= » 3.7 «eV»  ✓


Award [2] marks for a bald correct answer.

Syllabus sections