Magnetism and M...

In which case of comparing solenoid and bar magnet there is no exact similarity?

A bar magnet of magnetic moment 2.0 JT^-1 lies aligned with the direction of a uniform magnetic field of 0.25 T. What is the work done to turn the magnet so as to align its magnetic moment opposite to the field direction?

A paramagnetic substance of susceptibility 3 x 10^-4 is placed in a magnetic field of 4 x 10^-4 Am^-1. What is the intensity (in Am^-1) of magnetisation?

For a paramagnetic material, the dependence of magnetic susceptibility X on absolute temperature T is given by (C is a constant)

The relative permeability of iron is of the order 

Which of the following statements about bar magnets is correct ?

The magnetic susceptibility of a material of a rod is 449. Permeability of vacuum is 4π x 10^-7 henry/metre. The absolute permeability of the material of the rod (in henry/metre) is

If a bar magnet of pole strength q and magnetic moment m is divided into two equal pieces by cutting it perpendicular to its length, then

A small piece of a material is repelled by a strong magnet. The material is

A dip needle free to move in a vertical plane perpendicular to the magnetic meridian will remain

When a ferromagnetic substance is heated to a temperature above its Curie temperature, it

A needle made of bismuth is suspended freely in a magnetic field. The angle which the needle makes with the magnetic field is

A frog can be levitated in 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 a/an _______ substance.

Which of the following statement about magnetic field lines is true?

The relative permeability of a substance A is slightly greater than unity, while that of a substance B is slightly less than unity. Which of the following statements is correct?

A sensitive magnetic instrument can be shielded very effectively from outside fields by placing it inside a box of

When iron filings are sprinkled on a sheet of glass placed over a short bar magnet then,

Susceptibility is large and positive for

Susceptibility is small and positive for

Curie's law states that magnetic susceptibility is

From the following ,pick a property that is associated to ferromagnetic materials only :

Susceptibility is small and negative for

$$\chi _{1}$$and $$\chi _{2}$$  are susceptibilities of a diamagnetic substance at temperatures $$T_{1}K$$ and $$T_{2}K$$  respectively, then,

The magnetic force required to demagnetise the material is

At Curie temperature, in ferromagnetic materials

Hysteresis is shown by which of the following materials

Ferromagnetism is not found in