A straight wire lies east–west in a uniform magnetic field directed north. Its ends are connected to a voltmeter. The wire is first moved vertically upwards and then moved northwards at the same speed, entirely within the field.
How do the voltmeter readings compare?
A non-zero reading upwards; a zero reading northwards.
A zero reading upwards; a non-zero reading northwards.
Equal non-zero readings upwards and northwards.
Opposite non-zero readings upwards and northwards.
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.