Physics 0625 · IGCSE · Electromagnetic effects

Electromagnetic effects — practice question

Fig. 10.1 shows an electric screwdriver that contains an electric motor and a battery.

(a(i))[3]

State three methods of increasing the turning effect of the coil.

(a(ii))[1]

State what change in the coil reverses the direction of rotation.

(b)[3]

Calculate how many turns are on the secondary coil $N_s$.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “raise current in the coil” …