Which combination of the below makes iron preferable to steel in the making of electromagnets?

I. It retains its magnetic much longer than steel.
II. It is more easily magnetized than steel
III. It is more easily demagnetized than steel
IV. It produces a stronger magnet than steel

A. I and II only
B. II and III only
C. I, III, and IV only
D. II, III and IV only

Correct Answer:

Option B – II and III only

Explanation

Iron (soft iron) is usually preferred to steel in the making of electromagnets because it is more easily magnetized and equally more easily demagnetized than [II and III]