heated

brought near to one end of a magnet

suspended in north-south direction

treated with some chemical

directly proportional to the distance

inversely proportional to the distance

directly proportional to the square of the distance

inversely proportional to the square of the distance

conductance

resistance

reluctance

none of the above

strength of a magnet

strength of an electromagnet

magnetisation remained in an iron bar on withdrawal of the magnetising force

the conductivity of a magnetic material for the magnetic lines of force

Carbon steel

Platinum cobalt

ALNICO-V

All of these