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A and B points are present on the axis of a bar magnet of length 3 cm and at 24 cm and 48 cm respectively, from the opposite direction of the centre. The ratio of magnetic fields at these points is ...... . |
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Answer» `8:1`  The INTENSITY of MAGNETIC field on a axis of small magnet ` B alpha (1)/( z^3)` `therefore (B_1)/( B_2) = ((z_2)/(z_1) )^(3)` `therefore (B_1)/(B_2) = ((48)/( 24))^(3) = (2)^(3)` `therefore (B_1)/( B_2) = (8)/(1)` |
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