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1 markParticulate Nature of Electromagnetic Radiation

CAPE Physics Unit 2 · 2012 · Paper 2 · Question 3(a)(ii)b)

The photoelectric effect is investigated using an evacuated quartz tube circuit.

Explain what is meant by 'work function' with reference to the photoelectric effect.

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Other parts of this question

  1. 3(a)(i)State the name of the scientist credited with the explanation of the photoelectric effect.[1 mark]
  2. 3(a)(ii)a)Explain what is meant by 'threshold frequency' with reference to the photoelectric effect.[1 mark]
  3. 3(b)(i)Fill in the missing values of frequency in Table 2.[1 mark]
  4. 3(b)(ii)On the grid provided on page 11, plot a graph of stopping potential energy versus frequency for the metal.[4 marks]
  5. 3(b)(iii)a)Use your graph to determine the value of Planck's constant.[4 marks]
  6. 3(b)(iii)b)Use your graph to determine the work function of the metal.[3 marks]

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