(a(i))[2]
Explain why the indicator switches on and then switches off as the door is opened.
(a(ii))[2]
Suggest and explain why this occurs.
(b)[2]
A circuit breaker is advised for an electric lawnmower. State two reasons for this advice.
Physics 0625 · IGCSE · Electromagnetic effects
Electromagnetic effects — practice question
In Fig. 10.1, a magnet and a coil are fixed separately to a door and its frame. The arrangement is designed to switch on a circuit linked to an LED indicator whenever the door is opened or shut, giving a visual sign that the door is in use.