WAEC Physics 2011 Theory — Question 31

Model answer

Electromagnets are used in: (i) producing intense magnetic fields such as those required in generators and electric meters, (ii) lifting and transporting heavy pieces of iron and steel, plates, ladders, scrap iron etc, (iii) separating iron from mixtures containing non-magnetic substances, (iv) the operation of electromagnetic devices such as electric bell, telephone earpiece, magnetic relay and circuit breakers.