A braking mechanism uses a coil of wire that moves past a stationary magnet. The coil is part of a complete circuit while it is moving. The circuit is then opened, and the coil continues moving in the same way.
Explain why the complete circuit produces a braking force and how opening the circuit affects the force needed to keep the coil moving at the same speed.
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.