An iron bar magnet is heated to `1000^@C` and then cooled. Will it retain its magnetism?

An iron bar is heated to 1000^@C and then cooled in a magnetic field free space. Will it retain magnetism?

What happens when an iron bar is melted? Does it retain its magnetism?

An iron bar is magnetised with the help of another magnet or by subjecting it to a magnetising field. The magnetism acquired by the magnet is assumed due to the alignment of molecular magnet. Does the length to the iron bar undergo a change during the magnetisation process?

When a magnetic substance is heated, then it

A ball of superconducting material is dipped in liquid nitrogen placed near a bar magnet. What will be the direction of its magnetic moment?

A bar magnet of magnetic moment 1.5 JT^-1 lies aligned with the direction of a uniform magnetic field of 0.22 T. What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment? normal to the field direction.

A bar of diamagnetic substance is placed in a magnetic field with its length making angle theta with the direction of the magnetic field. How will the bar behave ?

A short bar magnet of magnetic moment 0.9 JT^-1 is placed with its axis at 45^@ to a uniform magnetic field. If it experiences a torque of 0.063 J: What orientation of the bar magnet corresponds to the stable equilibrium in the magnetic field?

A short bar magnet is placed with its north pole pointin north. The neutral point is 10 cm away from the centre of the magnet. If H=0.4G, calculate the magnetic moment of the magnet.