25 A magnetic needle of pole strength 20 3 Am is pivoted at

Last updated: 6/10/2023

25 A magnetic needle of pole strength 20 3 Am is pivoted at its centre Its N pole is pulled eastward by a string The horizontal force required to produce a deflection of 30 from magnetic meridian take B 10 T is 1 4 10 N 3 127 133 3 10 N 2 2 10 N 4 4 3x10 N