iGCSE Physics (0625) 4.5.2 A.C. Generator Paper 3 -Exam Style Questions- New Syllabus

Question

 (a) Fig. 11.1 shows in each of the diagrams a current-carrying conductor and a magnetic field pattern.

State the diagram which correctly shows the magnetic field around a current-carrying conductor.
(b) Fig. 11.2 shows three pieces of equipment.

i. Describe how to generate and detect an electromotive force (e.m.f.) using the equipment in Fig. 11.2.
You may draw a diagram.
ii. Describe two changes that will generate a larger e.m.f. using similar equipment to that in Fig. 11.2.

(c) A student connects a lamp and centre-zero galvanometer in series with a generator, as shown in Fig. 11.3.

The student observes the galvanometer needle moving from side-to-side repeatedly.
Explain why the needle moves in this way.