In which type of material the magnetic susceptibility does not depend on temperature?
diamagnetic
paramagnetic
ferromagnetic
ferrite
Rate of change of torque with deflection θ is maximum for a magnet suspended freely in a uniform magnetic field of induction B when
θ = 45o
θ = 60o
θ = 0o
θ = 90o
For protecting a sensitive equipment from the external magnetic field, it should be
placed inside an aluminium can
placed inside an iron can
wrapped with insulation around it when passing current through it
surrounded with fine copper sheet
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
The work done in turning a magnet of magnetic moment M by an angle of 90o from the meridian, is n times the corresponding work done to turn it through an angle of 60o. The value of n is given by
2
1
0. 5
0 . 25
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show
paramagnetism
anti-ferromagnetism
no magnetic property
diamagnetism
The dimensions of magnetic dipole moment will be
LA
ML-1 A
ML-1 A -2
L2 A
A diamagnetic material in a magnetic field moves
perpendicular to the field
from weaker to the stronger parts of the field
from stronger to the weaker parts of the field
in none of the above directions
The angle of dip is 90o at
earth's magnetic poles
equator
both (a ) and ( b )
None of these
Above curie temperature
a ferromagnetic substance becomes paramagnetic
a paramagnetic substance becomes diamagnetic
a diamagnetic substance becomes paramagnetic
a paramagnetic substance becomes ferromagnetic
