List of top Physics Questions on Magnetism asked in UP Board XII

Establish the formula of magnetic dipole moment.

The magnetic susceptibility \( \chi \) of paramagnetic substance varies with absolute temperature \( T \) as:

An electron projected towards East is deflected towards North by a magnetic field. The direction of magnetic field may be

What is meant by the concept of matter-wave of de Broglie ? Establish the relation for de Broglie wavelength in terms of kinetic energy.

The work function of photoelectric surface is 4.0 eV. Radiation of frequency \(3 \times 10^{15}\) Hz is incident on it. Calculate the maximum velocity of emitted photo-electron.

What is the solenoid ? Obtain the expression for magnetic field inside a long current carrying solenoid.

Differentiate between paramagnetic, diamagnetic and ferromagnetic substances by giving one example of each.

How does the magnetic susceptibility (\(\chi\)) of paramagnetics change with respect to absolute temperature (T) ?

Establish the formula for the force acting between two parallel current carrying straight wires of infinite length. Explain when and why the force between both current carrying conductors becomes
(i) attractive and
(ii) repulsive.

The field produced around current carrying conductor is:

Obtain the formula for the magnetic field at the centre of a current carrying circular coil with the help of Biot-Savart law.

A coil of area $5 \, \text{cm}^2$ is placed in a uniform magnetic field of $1.5 \, \text{m}$. If the coil has 100 turns and $0.2 \, \text{A}$ of current is passed in it, then find:

Magnetic dipole moment of the coil
Maximum torque on the coil

If actual angle of dip is $\theta$ and $\theta'$ is the angle of dip in a plane at an angle $\alpha$ from the magnetic meridian, then $\dfrac{\tan \theta'}{\tan \theta}$ is