A coil is attached to a pendulum and connected to an oscilloscope by flexible leads. As the pendulum swings, the coil moves repeatedly towards and away from the north pole of a fixed magnet.
Which statement describes the signal on the oscilloscope while the pendulum keeps swinging?
It is alternating because the direction of the coil's movement reverses.
It remains positive because the north pole always faces the coil.
It remains zero because the permanent magnet is not moving.
It becomes steadily larger because each swing adds another induced 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.