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3 marksRadioactivity

CAPE Physics Unit 2 · 2001 · Paper 2 · Question 3(a)(i)

Laboratory investigations involving beta particles and electron-target interactions.

Describe an experiment that can be performed in the laboratory to show the existence of β-particles.

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Other parts of this question

  1. 3(a)(ii)Explain how to determine the sign of the charge of a β-particle.[1 mark]
  2. 3(b)(i)Electrons are accelerated through a potential difference of 40 000 V before striking a target to produce X-rays. Calculate the minimum cut-off wavelength λ_0…[5 marks]
  3. 3(b)(ii)State what change occurs in λ_0 if the accelerating potential difference is doubled.[1 mark]

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