AIPMT-PRELIMS Physics Magnetism and Matter Class 12 Questions

Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing in them are I and 2I, respectively. The resultant magnetic field induction at the centre will be

A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It:

Electromagnets are made of soft iron because soft iron has

A vibration magnetometer placed in magnetic meridian has a small bar magnet,. The magnet executes oscillations with a time period of 2 sec in earth's horizontal magnetic field of 24 microtesla. When a horizontal field of 18 microtesla is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be

If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is:

Curie temperature is the temperature above which -

Above Curie temperature:

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by μd, μp and μf respectively, then :

A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to this period and motion if this mass is quadrupled -

According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature T is proportional to -

Diamagnetic material in a magnetic field moves :

Two bar magnets having same geometry with magnetic moments M and 2M, are firstly placed in such a way that their similar poles are same side then its time period of oscillation is T₁. Now the polarity of one of the magnet is reversed then time period of oscillation is T₂, then :-

If number of turn, area and current through it is given by n, A and i respectively then its magnetic moment will be :-

Among which the magnetic susceptibility does not depend on the temperature :-