In a power station, a turbine turns a generator.
The generator has a large rotating electromagnet inside fixed coils of wire.
Describe how the generator produces a potential difference across the fixed coils.
State two changes that would increase the size of the potential difference produced by the generator.
In a laboratory, a student induces a current by pushing a bar magnet into a coil by hand.
Give two differences between the way a potential difference is induced in the laboratory and the way it is induced in the power station generator.
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.