At a place, the horizontal component of earth's magnetic field is B and angle of dip is `60^@`. What is the value of horizontal component of earth's magnetic field at equator?

Explanation

The earth's magnetic field at a 0.32 G and it lies in a vertical plane `12^(@)` west of the geographic meridian making an angle of `60^(@)` with the horizontal direction. On the equator, the values of both angle of dip and vertical component of earth's magnetic field is zero.