In which type of material the magnetic susceptibility does not depend on temperature?
Diamagnetic
Paramagnetic
Ferromagnetic
Ferrite
A bar magnet has a magnetic moment of 2.5 JT-1 and is placed in a magnetic field of 0.2 parallel to anti parallel position relative to the field direction is :
zero
0.5 J
2.0 J
1 J
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show :
para magnetism
anti-ferro magnetism
no magnetic property
diamagnetism
A diamagnetic substance is brought near a strong magnet, then it is :
attracted by a magnet
repelled by a magnet
repelled by north pole and attracted by south pole
attracted by north pole and repelled by south pole
Two bar magnets having same geometry with magnetic moment M and 2 M, are firstly placed in such a way that their similar poles are on the same side, then its period of oscillation is T1. Now the polarity of one of the magnets is reversed the time period of oscillations becomes T2. Then
T1 < T2
T1 > T2
T1 = T2
A bar magnet is oscillating in earth’s magnetic field with a period T. What happen to its period of motion, if its mass is quadrupled?
Motion remains simple harmonic with new period = T/2
Motion remains simple harmonic with new period = 2 T
Motion remains simple harmonic with new period = 4 T
Motion remains simple harmonic and the period stays nearly constant
A bar magnet is placed with its north pole pointing earth’s north. The points of zero magnetic field will be which direction from the centre of the magnet?
north and south
east and west
north-east and south-west
north-east and south-east
A bar magnet having a magnetic moment of 2 × 10 4 JT -1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 × 10-4 T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60o from the field is
0.6 J
12 J
6 J
2 J
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is
repelled by both the poles
repelled by the north pole and attracted by the south pole
attracted by the north pole and repelled by the south pole
attracted by both the poles
Above curie temperature
a ferromagnetic substance becomes paramagnetic
a paramagnetic substance becomes diamagnetic
a diamagnetic substance becomes paramagnetic
a paramagnetic substance becomes ferromagnetic
