List of top Physics Questions on Magnetism and matter asked in MET

Coercivity \(=4\times10^3 A/m\). Solenoid: 500 turns, length 1 m. Find current needed to demagnetise.

A magnet makes 40 oscillations per minute at a place with \(B_H = 0.1\times10^{-5}T\). At another place, time period is 2.5 s. Find \(B_H\) there.

A short bar magnet is placed with its south pole towards geographical north. Neutral points are at 20 cm from centre. Given \(B_H = 0.3\times10^{-4}\,Wb/m^2\), find magnetic moment.