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When a bar magnet is placed at 90^(@) to a uniform magnetic field, it is acted upon by a couple which is maximum. For the couple to be half of the maximum value, at what angle should the magnet be inclined to the magnetic field (B)? |
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Answer» SOLUTION :We know that , `TAU = MB sin theta ` If ` theta = 90^(@) " then " tau_("max")=MB`........... (1) From equation (1) and (2) `2 = (1) sin thetaor sin theta = (1)/(2) or theta = 30^(@)` |
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