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5.2 The electromagnetic spectrum

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Question 21
H

A radio transmitter produces radio waves from an aerial.

Which statement describes how the radio waves are produced?

[1]
A

A direct current makes electrons in the aerial move steadily, which emits radio waves

B

Nuclei in the metal of the aerial vibrate, and emit radio waves as they decay

C

Electrons in the aerial absorb light, and emit it again as radio waves of lower frequency

D

An alternating current makes electrons in the aerial oscillate, which emits radio waves

Markscheme

5.2 The electromagnetic spectrum Questions

  1. GCSE
  2. /Physics
  3. /5.2 The electromagnetic spectrum

48 exam-style questions on OCR GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves in space, 5.2.2 Energy transfer by electromagnetic waves, 5.2.3 Frequency and wavelength across the spectrum, 5.2.4 Groups of the electromagnetic spectrum, 5.2.5 Visible light and the limits of human sight, 5.2.6 Light as an electromagnetic wave, 5.2.7 Uses of electromagnetic waves, 5.2.8 Hazards of ultraviolet, X-rays and gamma rays, 5.2.9 Ultrasound and imaging inside the body, and 5.2.10 Radio waves and oscillating circuits. Each one has a worked solution and a mark scheme showing where the marks go.

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