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1.
The time period of oscillation of a freely suspended bar magnet with usual notations is given by
2.
Two identical short bar magnets, each having magnetic moment 
, are placed a distance of 
apart with axes perpendicular to each other in a horizontal plane. The magnetic induction at a point midway between them is
, are placed a distance of apart with axes perpendicular to each other in a horizontal plane. The magnetic induction at a point midway between them is
3.
The distance of two points on the axis of a magnet from its centre is 
and 
respectively. The ratio of magnetic intensity at these points is 
. The length of the magnet will be
and respectively. The ratio of magnetic intensity at these points is . The length of the magnet will be
4.
Lines which represent places of constant angle of dip are called
5.
A short bar magnet has a length 
and a magnetic moment
. Find the magnetic field at a distance of 
from its centre on the axial line. Here, 
is negligible as compared to
.
and a magnetic moment. Find the magnetic field at a distance of from its centre on the axial line. Here, is negligible as compared to.