An exercise machine turns the coils in two generator units at a steady rate.
Unit R connects its coil to the external circuit using a split-ring commutator. Unit S connects its coil using slip rings. The induced potential difference in each coil reverses after every half turn.
Which statement correctly describes the potential difference supplied to the external circuit?
R supplies a steady direct potential difference; S supplies a pulsing direct potential difference.
R supplies an alternating potential difference; S supplies a pulsing direct potential difference.
R supplies a steady direct potential difference; S supplies an alternating potential difference.
R supplies a pulsing direct potential difference; S supplies an alternating potential difference.
92 exam-style questions on Edexcel GCSE Physics 13.1 Inducing a current, covering 13.1.1 Producing an electric current by induction, 13.1.2 Factors affecting the induced potential difference, 13.1.3 Alternators and dynamos, and 13.1.4 Microphones and loudspeakers. Each one has a worked solution and a mark scheme showing where the marks go.