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5.2 Radioactivity

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Question 76

When measuring the count rate of a radioactive source, the background radiation must be subtracted to obtain the corrected count rate.

Which option shows only sources of background radiation?

A

Cosmic rays from space and radon gas from the ground

B

Radon gas from the ground and infrared radiation from a heater

C

Cosmic rays from space and microwaves from mobile networks

D

Radio waves from broadcasting and X-rays from hospital scans

Markscheme

5.2 Radioactivity Questions

  1. IGCSE
  2. /Physics
  3. /5.2 Radioactivity

484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.

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