Fig. 9.1 depicts a magnet fixed to the end of a spring, together with a coil of wire linked to a sensitive centre-zero galvanometer. The labels on the diagram are: spring, coil of wire, centre-zero galvanometer, and the magnet poles N and S.
(a(i))[4]
Describe and explain what happens to the needle of the sensitive galvanometer.
(a(ii))[1]
State the effect of using a stronger magnet on what happens to the needle of the galvanometer.
(b)[2]
Calculate how many turns there are on the primary coil.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The needle oscillates as the magnet moves” …