A compass needle oscillates 20 times per minute at a place where dip is 450 and 30 times per minute where dip is 300 . The total magnetic field of earth at second to first places is
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.