Q. 205.0( 1 Vote )

A deflection magnetometer is placed with its arms in north-south direction. How and where should a short magnet having M/BH = 40 A m2T–1 be placed so that the needle can stay in any position?

Answer :


d =?

d ≫≫≫l

d = 0.02 m =2cm

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The force on a north pole, is parallel to the field . Does it contradict our earlier knowledge that a magnetic field can expert forces only perpendicular to itself.

HC Verma - Concepts of Physics Part 2