Effect due to which earth's magnetism exist is called

The study of earth's magnetic field is called as

The study of earth's magnetic field is called as

The space surrounding a magnet within which its magnetic effect is felt is called

The line on which magnetic potential due to a bar magnet is zero is called

The torque on a bar magnet due to the earth's magnetic field is maximum when the axis of the magnet is

If the horizontal intensity due to the earth's magnetic field is 4 gauss at magnetic equator, then horizontal intensity of magnetic poles is _______. (Fill in the blanks.

The torque on a bar magnet due to the earth's magnetic field is maximum when the axis of the magnet is

The line joining the points of horizontal component of earth's magnetic field is called