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