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1.
Needles 
and 
are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them will
and are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them will
2.
A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is 
s. One of the magnets is removed and if the other magnet oscillates in the same field , then the time period in second is
s. One of the magnets is removed and if the other magnet oscillates in the same field , then the time period in second is
3.
If a magnet is hanged with its magnetic axis then it stops in
4.
A bar magnet when placed at an angle of 
to the direction of magnetic field induction of 
experiences a moment of couple 
If the length of the magnet is 5 cm, its pole strength is
to the direction of magnetic field induction of experiences a moment of couple If the length of the magnet is 5 cm, its pole strength is
5.
Domain formation is the necessary feature of
6.
A short bar magnet placed with its axis at with a uniform external magnetic field of 
tesla experiences a torque of magnitude 0.032 J. The magnetic moment of bar magnet will be
with a uniform external magnetic field of tesla experiences a torque of magnitude 0.032 J. The magnetic moment of bar magnet will be
7.
Some equipotential surfaces of the magnetic scalar potential are shown in the figure. Magnetic field at a point in the region is
8.
Two like magnetic poles of strength 10 and 45 SI units are separated by a distance 
. The intensity of magnetic field is zero on the line joining them
. The intensity of magnetic field is zero on the line joining them
9.
A bar magnet of magnetic moment 
is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of 
to a direction 
from the field will be
is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of to a direction from the field will be
10.
The figure illustrates how 
, the flux density inside a sample of unmagnetised ferromagnetic material, varies with 
, the magnetic flux density in which the sample is kept. For the sample to be suitable for making a permanent magnet
, the flux density inside a sample of unmagnetised ferromagnetic material, varies with , the magnetic flux density in which the sample is kept. For the sample to be suitable for making a permanent magnet