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Question
Physics
A short bar magnet has magnetic moment of 50 Am 2. Calculate the magnetic field intensity at a distance of 0.2 m from its centre on axial line.
Q. A short bar magnet has magnetic moment of
50
A
m
2
. Calculate the magnetic field intensity at a distance of
0.2
m
from its centre on axial line.
7935
231
Magnetism and Matter
Report Error
A
1.5
×
1
0
−
4
T
15%
B
1.25
×
1
0
−
4
T
34%
C
1.5
×
1
0
−
3
T
20%
D
1.25
×
1
0
−
3
T
32%
Solution:
As we know,
B
=
4
π
r
3
μ
0
2
M
=
(
0.2
)
3
1
0
−
7
×
2
×
50
=
8
×
1
0
−
3
1
0
−
7
×
100
B
=
1.25
×
1
0
−
3
T