The magnet can be completely demagnetized by

Coercivity of a magnet where the ferromagnet gets completely demagnetized is 3 xx 10^(3) A m^(-1) , The minimum current required to be passed in a solenoid having 1000 turns per metre, so that the magnet gets completely demagnetized when placed inside the solenoid is

How can a magnet be demagnetized ?

Can the given heat energy be completely converted to work in a cyclic process? If not , when can the heat can completely converted to work ?

Can error be completely eliminated ?

A magnet can be demagnetised by

How a magnet can be demagnetized?

Statement -1 : The sensitvity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil. Statement - 2: Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.