Magnetism and Matter PYQs

Match List-I with List-II. Choose the correct answer from the options given below:

A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to: A. hold the sheet there if it is magnetic. B. hold the sheet there if it is non-magnetic. C. move the sheet away from the pole with uniform velocity if it is conducting. D. move the sheet away from the pole with uniform velocity if it is both, non-conducting and non-polar. Choose the correct statement(s) from the options given below:

The relations amongst the three elements of earth’s magnetic field, namely horizontal component H, vertical component V and dip δ are, ($B_E$ = total magnetic field)

A bar magnet of length $l$ and magnetic dipole moment $M$ is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be

A magnetic needle suspended parallel to a magnetic field requires √3 J of work to turn it through 60°. The torque needed to maintain the needle in this position 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

If the temperature and magnetic field applied across a paramagnetic substance are both tripled, by how many times will the intensity of magnetization change?

Above Curie temperature:

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material is denoted by $\mu_d$, $\mu_p$ and $\mu_f$ respectively, then