21. A magnet has a pole strength of 1000
milli amp.m. The magnetic field
intensity at a distance of 10 cm from its
North pole is
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Answer:
Thus, the magnetic field intensity is equal to 25πA/m.
Explanation:
Magnetic field intensity=
4πd
2
p
=
4π(10×10
−2
)
2
1000×10
−3
=
π
25
A/m
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