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Q.29. Explain the origin of magnetism on the basis of circulating charges.Define magnetic axis and pole strength.

Answer»

The product of the distance (2 l) between the twopolesand thepole strengthof eitherpoleis calledmagneticdipole moment. Its SI unit is 'joule/tesla' or 'ampere-metre^2'. Its direction is from southpoletowards northpole. Where θ is angle between the dipoleaxisandmagneticfield.



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