Magnetic screening is:

1. Not possible

2. Possible using superconductors

3. Possible using the iron ring as cover

4. Both (2) & (3)

The apparent dip at a place is always greater than or equal to the value of true dip at that place. This is due to

1.  An increase in the apparent value of B_V

2. A decrease in the apparent value of B_H

3. An increase in the apparent value of B_H

4. Both (1) & (2)

If a bar magnet is kept on a horizontal plane with N-pole of bar magnet facing geographic N-pole and S-pole of bar magnet facing geographic S-pole, then the number of neutral points is:

The magnetization of a piece of iron or steel:

A Gaussian surface is drawn enclosing the N-pole of a bar magnet. The net magnetic flux through the Gaussian surface will be:
(pole strength of N-pole is treated as positive and S-pole as negative)

A material when heated suddenly changes its magnetic property at a particular temperature and above this temperature, its susceptibility is found to be inversely proportional to the absolute temperature. The material may be:

1. Ferromagnetic

2. Diamagnetic

3. Paramagnetic

4. Ferromagnetic or Paramagnetic

At angle cos^{-1$\left(\frac{1}{\sqrt{3}}\right)$} to the magnetic meridian, the apparent dip is 60$°$. The true dip at the place is :

1. 30$°$

2. 45$°$

3. 0$°$

4. 60$°$

A long solenoid has 1500 turns per metre and an iron core of ${\mu }_r$ = 1100 is kept inside it. 2A current flows in the coil of the solenoid. If the core is heated beyond curie temperature, then:

Choose the correct statement regarding magnetism.

The horizontal component of the earth's magnetic field at a place is 3$\times$10^-4 T and the dip is tan^{-1$\left(\frac{4}{3}\right)$}. A metal rod of length 0.25 m placed in the north-south position and is moved at a constant speed of 10cm/s towards the east. The emf induced across the length of the rod will be

1. Zero

2. 1 $\mu V$

3. 5 $\mu V$

4. 10 $\mu V$