Question

Name a physical quantity whose unit is Am2

Answer 1

Answer:

Physical quantity whose unit is $Am^2$ is "Magnetic dipole moment".

Explanation:

Magnetic orientation and magnetic field of a magnetic substance is defined by magnetic moment of that substance.

It is a vector quantity and points from south to north pole of a magnet.

Magnetic moment is produced by:

1. Motion of electric charge

2. spin angular momentum

Magnetic moment for a current loop is given by the formula:

$M=I.A$

where, $I$ is the current flowing through the loop,

$A$ is the area of loop.

S.I. unit of $I =[A]$ = Ampere

S.I. unit of area $A = m^2$

Therefore, the S.I. unit of magnetic dipole moment = $Am^2$

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