A small magnet is fixed to the end of a pendulum. On each swing, the magnet passes through a coil connected to a resistor by a switch. The pendulum is released from the same height in two trials. In one trial the switch is open; in the other it is closed.
Compared with the trial with the switch open, what happens in the trial with the switch closed after the magnet has passed through the coil?
Energy is transferred to the resistor, and the pendulum rises to a lower height.
No energy is transferred to the resistor, and the pendulum rises to the same height.
No energy is transferred to the resistor, and the pendulum rises to a lower height.
Energy is transferred to the resistor, and the pendulum rises to the same height.
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.