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20.2 Magnetic Field

The Magnetic field and its intensity B

This concept is similar to the electrostatic field.
Hence = is also analogous to .

The S.I. unit of pole- strength is 1 Ampere - meter and that of B is 1 newton/ Ampere - meter which is also called 1 weber/ m2 or 1 Tesla.

Bar Magnets and Dipole Moments

Intensity on the Axis

Direction of therefore is same as that of

Intensity on the Equator

The direction of is opposite to that of .

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20.1 Coulomb's Law
20.2 Magnetic Field
20.3 Torque on a bar-magnet
20.4 Gauss's Law

Chapter 21

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