List of top Physics Questions on Magnetism and matter asked in MHT CET

Which law states that magnetic susceptibility is inversely proportional to absolute temperature?
According to Curie’s Law, what happens to magnetic susceptibility if absolute temperature is doubled?
If $M$ is the magnetisation induced in the material, H is the magnetic field intensity, B is the net magnetic field inside the material then the correct relation between them is ( $\mu_0 = \text{permeability of free space}$)
If $M$ is the magnetisation induced in the material, H is the magnetic field intensity, B is the net magnetic field inside the material then the correct relation between them is ( $\mu_0 = \text{permeability of free space}$)
A coil of 100 turns, carrying a current of \( 5 \, \text{A} \), is placed in a magnetic field of \( 2 \, \text{T} \). The area of each turn is \( 0.01 \, \text{m}^2 \). What is the magnetic moment of the coil?
A 0.5 m long solenoid has 400 turns and carries a current of \( 3 \, \text{A} \). What is the magnetic field at the center of the solenoid?
A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, then the current in the coil
A magnet having a magnetic dipole moment ' M is placed in two magnetic fields ' \( B_1 \) ' and ' \( B_2 \) ' respectively. If it is displaced slightly from the equilibrium position, it oscillates $60$ times in $20$ second in field ' \( B_1 \) ' and $60$ times in $30$ second in field ' \( B_2 \) '. The ratio of field ' \( B_1 \) ' to that of ' \( B_2 \) ' is
Which of the following is NOT an example of diamagnetic substance?
Which of the following is ferromagnetic:
In the hysteresis curve the value of magnetization (B) which will be present in a substance when value of magnetizing force (H) is made zero (H = 0) is called as}

A magnetizing field of 1000 A/m produces a magnetic flux of 2.4 x 10-5 Wb in an iron bar of cross-sectional area 0.3 cm2.The magnetic permeability of the iron bar in SI unit is

The permeability of a metal is $0.1256\ \text{T}\cdot\text{m}\cdot\text{A}^{-1}$. Its relative permeability will be ($\frac{\mu_0}{4\pi} = 10^{-7}\ \text{SI unit}$, $\pi = 3.14$)
The relative permeability of iron is 2000. Its absolute permeability in SI unit will be [$\frac{\mu_0}{4\pi} = 10^{-7}\text{ T}\cdot\text{m}\cdot\text{A}^{-1}$]
A bar magnet has length 3 cm, cross-sectional area $2\ \text{cm}^2$ and magnetic moment $3\ \text{A m}^2$. The intensity of magnetisation of the bar magnet is
A current $I$ is flowing in a conductor of length $L$. When it is bent in the form of a circular loop, its magnetic moment will be
What is susceptibility of a medium, if its relative permeability is 0.85?
If the charge to mass ratio of an electron is 'A' C/kg, then the gyromagnetic ratio of an orbital electron in C/kg is
What is susceptibility of a medium, if its relative permeability is 0.85?
If $M_z$ = magnetization of a paramagnetic sample, $B$ = external magnetic field, $T$ = absolute temperature, $C$ = curie constant then according to Curie�s law in magnetism, the correct relation is
A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, then the current in the coil
If a magnetic substance is kept in a magnetic field then which of the following substances is thrown out ?
Two short magnets have equal pole strengths but one is twice as long as the other. The shorter magnet is placed 20 cm in tan A position from the compass needle. The longer magnet must be placed on the other side of the magnetometer for no deflection at a distance equal to
Consider a short magnetic dipole of magnetic length 10 cm. Its geometric length is
Direction of magnetic field at equatorial point is