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

In the diagram above, if the south-poles of two magnets strokes steel bar, the polarities at T and V will respectively be

The name given to the characteristics behavior of substances which set their length perpendicular to a strong magnetic field instead of in line with it is

If a bar magnet is accidentally broken into three pieces as shown in the diagram above, the polarities of P and Q respectively are

Which material is best for making a permanent magnet?