Quelpr
1 markParticulate Nature of Electromagnetic Radiation

CAPE Physics Unit 2 · 2017 · Paper 2 · Question 3(b)(iii)

A plot of stopping potential V_s against frequency f of incident light on an unknown metal is shown in Figure 5.

State what the slope of this graph represents physically.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 3(a)Identify the parts or quantities indicated by labels P, Q, and R in Figure 4.[3 marks]
  2. 3(b)(i)Determine the slope of the graph in SI units.[4 marks]
  3. 3(b)(ii)Formulate the algebraic equation relating stopping potential V_s to incident frequency f using the graph in Figure 5.[3 marks]
  4. 3(b)(iv)From the graph, determine the threshold wavelength for the unknown metal.[4 marks]

More practice: the rest of this paper · more Particulate Nature of Electromagnetic Radiation questions · all CAPE Physics Unit 2 past papers