Question

Electromagnets are made of soft iron because soft iron has

• A. low retentivity and high coercive force
• B. high retentivity and high coercive force
• C. low retentivity and low coercive force
• D. high retentivity and low coercive force

Answer 1

The correct option is D high retentivity and low coercive force

Electromagnets are made of soft iron because: Soft iron has high retentivity- When the magnetising field is reduced to zero, soft iron retains magnetisation. andLow coercive force-To demagnetise thesoft iron, a small force is required .

Correct option-(b)