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

A deflection magnetometer is adjusted in the usual way. When a magnet is introduced, the deflection observed is $\theta$, and the period of oscillation of the needle in the magnetometer is $T$. When the magnet is removed, the period of oscillation is $T_0$. The relation between $T$ and $T_0$ is
In water, value of magnetic field decreases. Water is a diamagnetic substance.
Consider the circular loop having current $i$ and with central point $O$. The magnetic field at the central point $O$ is
The variation of magnetic susceptibility with the temperature of a ferromagnetic material can be ploted as
Which one of the following is not made of soft iron?
A bar magnet of magnetic moment $10^{4}\, J / T$ is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of $4 \times 10^{-5}\, T$ to a direction of $60^{\circ}$ from the field will be
Magnetic force between two short magnets, when they are co-axial follows inverse square law of distance. The magnetic forces between two poles do not follow inverse square law of distance.
Which of the following substances magnetic susceptibility $\chi_{m}$ is negative?
The magnetic poles of earth do not coincide with the geographic poles. The discrepancy between the orientation of a compass and true north-south direction is known as magnetic declination.
The true geographic north direction is found by using a compass needle. The magnetic meridian of the earth is along the axis of rotation of the earth.
A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as
Force between two identical bar magnets whose centres are $r$ metre apart is $4.8\, N$ when their axes are in the same line. If separation is increased to $2\, r$, the force between them is reduced to
Angle of dip is $90^{\circ}$ at
When a magnetic substance is heated, then it
Lines of force, due to earth?? horizontal magnetic field, are
Domain formation is the necessary feature of
Susceptibility is positive for
Curie temperature of iron is the temperature below which, it is