An electromagnet is placed beside a second coil connected to a sensitive ammeter. Both coils are fixed in position.
The electromagnet is connected to a direct current supply. After the switch has been closed, the current in the electromagnet becomes constant.
A student predicts that the ammeter will continue to show a current because the electromagnet is switched on.
Explain why the student's prediction is incorrect.
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.