A wire and a magnet experience equal and opposite magnetic forces when current flows. The wire moves, but the clamped magnet remains stationary. Which explanation is correct?
The forces act on the same object, and the clamp balances the force on the wire.
The forces act on different objects, and the clamp removes the force on the magnet.
The forces act on the same object, and the clamp removes the force on the wire.
The forces act on different objects, and the clamp balances the force on the magnet.
86 exam-style questions on Edexcel GCSE Physics 12.3 The motor effect, covering 12.3.1 The motor effect, 12.3.2 Fleming's left-hand rule, 12.3.3 Force on a conductor, and 12.3.4 Electric motors. Each one has a worked solution and a mark scheme showing where the marks go.