Question

Write two properties of a material suitable for making (a) a permanent magnet, and (b) an electromagnet.

Answer 1

(a) Two properties of material used for making permanent magnets are

(i) High coercivity

(ii) High retentivity

(iii) High permeability

(b) Two properties of material used for making electromagnets are

(i) High permeability

(ii) Low coercivity

(iii) Low retentivity