Physics 5054 · O Level · Electromagnetic induction

Electromagnetic induction — practice question

Fig. 7.1 illustrates the arrangement of a transformer. A lamp is attached to the secondary coil.

(a)[2]

Explain why iron is used for the transformer core.

(b(i))[2]

State two differences between an alternating current and a direct current.

(b(ii))[2]

Explain why the lamp does not light when a direct current flows in the primary coil.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “a magnetic material” …