A magnet is pushed into a coil of wire at a steady speed. The coil is connected to a sensitive ammeter. The ammeter needle moves to the right.
The magnet is then pulled out of the coil at the same speed.
What does the ammeter show as the magnet is pulled out?
The needle moves to the left by the same amount
The needle moves to the right by the same amount
The needle moves to the right by a larger amount
The needle stays at zero as the magnet moves away
48 exam-style questions on OCR GCSE Physics 4.2 Uses of magnetism, covering 4.2.1 The motor effect, 4.2.2 Fleming's left-hand rule, 4.2.3 The force on a current-carrying conductor, 4.2.4 The electric motor, 4.2.5 Electromagnetic induction, 4.2.6 Alternators and dynamos, 4.2.7 How transformers work, 4.2.8 Transformer turns ratio, 4.2.9 Potential differences and turns in transformers, and 4.2.10 Microphones, loudspeakers and headphones. Each one has a worked solution and a mark scheme showing where the marks go.