Magnetic Effect...

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

which of the following statements about earth's magnetism is correct

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?

Two short bar magnets of magnetic moment 'M' each are arranged at the opposite corners of a square of side 'd', such that their centres coincide with the corners and their axes are parallel. If the like poles are in the same direction, the magnetic field at any of the other corners of the square is

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

At a certain place, the horizontal component of earth's magnetic field is  times the vertical component. The angle of dip at that place is

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