The magnetic moment of a magnet of length $10\, cm$ and pole strength $ 4.0\, Am$ will be......$A{m^2}$
$0.4$
$1.6$
$20$
$8$
(a)$M = mL = 4 \times 10 \times {10^{ – 2}} = 0.4\,A \times {m^2}$
A bar magnet of magnetic moment $10^4\,J/T$ is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of $4×10^{-5}\, T$ to a direction $ 60° $ from the field will be…..$ J$
A bar magnet of magnetic moment $M$ is cut into two parts of equal length. The magnetic moment of each part will be ……… $M$
A permanent magnet
Two lines of force due to a bar magnet
Draw field lines on a bar magnet, a current carrying finite solenoid and electric dipole.
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