Physics 0625 · IGCSE · Simple phenomena of magnetism

Simple phenomena of magnetism — practice question

(a)[3]

Describe how to demagnetise a bar magnet by using alternating current (a.c.) in a coil.

(b(i))[3]

Explain the function of the split-ring commutator.

(b(ii))[1]

State the effect of this on the motor.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Put the magnet in the coil” …