When the upper tip of a magnetic dip needle is loaded with a small mass, the dip is found to drop from 45^@ to 30^@If the total magnetic intensity at the place is 0.42 oersted and the pole strength of the magnetic needle is 200 CGS units, what is the mass attached?

When the upper tip of a magnetic dip needle is loaded with a small mas

1.	When the upper tip of a magnetic dip needle is loaded with a small mass, the dip is found to drop from 45^@ to 30^@If the total magnetic intensity at the place is 0.42 oersted and the pole strength of the magnetic needle is 200 CGS units, what is the mass attached?
Answer» Solution :As shown in fig., on loading the upper end of the needle for its rotational, equilibrium, `vecrxxvacF+vacMxxvacB=0` `i.e.,MgxxLcos30^(@)=mxx2LxxBsin(45^@-30^@)` i.e.,`M=2mBsin15^(@)/gcos30^(@)` Substituting the current data, `M=2xx200xx0.42xx9.2588/980xx(SQRT(3)//2) = 0.051 g`

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When the upper tip of a magnetic dip needle is loaded with a small mass, the dip is found to drop from 45^@ to 30^@If the total magnetic intensity at the place is 0.42 oersted and the pole strength of the magnetic needle is 200 CGS units, what is the mass attached?

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