List of top Physics Questions on The Earth’s Magnetism asked in KEAM

A dip needle vibrates in a vertical plane perpendicular to the magnetic meridian. The time period of vibration is
For a linear material, the relation between the relative magnetic permeability \( \mu_r \) and magnetic susceptibility \( \chi \) is:
The magnetic field at the centre of a circular coil having a single turn of the wire carrying current \( I \) is \( B \). The magnetic field at the centre of the same coil with 4 turns carrying the same current is:
A current carrying square loop is suspended in a uniform magnetic field acting in the plane of the loop. If \( \vec{F} \) is the force acting on one arm of the loop, then the net force acting on the remaining three arms of the loop is:
The total intensity of earth's magnetic field at the poles is 7 units. Its value at the equator is