An engineer wants to increase an alternator's peak potential difference without changing its output frequency.
Which change should be made?
Use the same magnet and increase the rotational speed.
Use a weaker magnet and keep the rotational speed unchanged.
Use a stronger magnet and keep the rotational speed unchanged.
Use the same magnet and decrease the rotational speed.
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.