Physics 0625 · IGCSE · Electromagnetic effects

Electromagnetic effects — practice question

Fig. 9.1 shows part of a d.c. electric motor. The wire coil turns at a steady speed.

(a)[2]

State two changes that would make the coil turn faster.

(b)[3]

Calculate the number of turns on the secondary coil. Use the information in Fig. 9.3.

(c)[2]

Describe how a fuse operates.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Raise battery voltage OR larger current” …