Force between two identical bar magnets whose centres are r

Last updated: 6/24/2023

Force between two identical bar magnets whose centres are r m apart is 4 8 N when their axes are in the same line If separation is increased to 2r the force between them is reduced to 1 2 4 N 3 1 2 N 2 0 6 N 4 0 3 N A magnetic needle oscillates in a horizontal plane with a period T at a place where the angle of dip is 60 When the same needle is made to oscillate in a vertical plane coinciding with the magnetic meridian its period will be 1 T 2 2 T 3 2 T 4 2T If mass is increased 4 times then the time period of a magnetometer when suspended in earth s magnetic field becomes 2 quadruple 1 double COLL IC