At a model railway exhibition, a controller sends a radio signal to a locomotive. The signal reaches the locomotive's receiving aerial.
What happens in the receiving circuit as the signal arrives?
The changing magnetic field of the radio wave makes protons in the receiving aerial oscillate at the frequency of the incoming wave.
The electric field of the radio wave makes electrons in the receiving aerial move steadily in one direction.
The changing electric field of the radio wave makes electrons in the receiving aerial oscillate at the frequency of the incoming wave.
The radio wave transfers energy to the receiving aerial but does not make its electrons move.
104 exam-style questions on Edexcel GCSE Physics 5.4 Uses and dangers of EM radiation, covering 5.4.1 Dangers of electromagnetic radiation, 5.4.2 Uses of electromagnetic radiation, 5.4.3 Radio waves and oscillations in circuits, and 5.4.4 Changes in atoms and nuclei generating radiation. Each one has a worked solution and a mark scheme showing where the marks go.