A student is investigating a simple AC generator and wishes to decrease the maximum electromotive force (e.m.f.) induced in the coil.
Which modification to the generator would result in a decrease in the maximum induced e.m.f.?
Increase the rotational frequency of the coil.
Increase the cross-sectional area of the coil.
Replace the soft iron core inside the coil with a non-magnetic plastic core.
Increase the number of turns of wire in the coil.
24 exam-style questions on CIE IGCSE Physics 4.5.2 The a.c. generator. Each one has a worked solution and a mark scheme showing where the marks go.