(a)[2]
State Faraday’s law for electromagnetic induction.
(b(i))[1]
State one function that a transformer performs.
(b(ii))[3]
A sinusoidal alternating current in the primary coil creates a varying magnetic flux linking the secondary coil. Use Faraday’s law to explain why the transformer’s output is an alternating electromotive force (e.m.f.).
(b(iii))[1]
State the reason the soft-iron core of the transformer is laminated.