A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north up pointing down at `22^@` with the horizontal. The horizontal component of the earth's magnetic field at the place is known to be 0.35 G. Determine the magnitude of the earth's magnetic field at the place.

What are horizontal and vertical components of earth's total magnetic field ?

Name a device who shows the direction of horizontal component of a magnetic field.

At a certain location in Africa, a compass points 12^@ west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points 60^@ above the horizontal. The horizontal component of the earth's held is measured to be 0.16 G. Specify the direction and magnitude of the earth's field at the location.

A compass needle, free to turn in a vertical plane orients itself with its axis vertical at a certain place on the earth. Find out the values of horizontal component of earth.s magnetic field and

What are i. Magnetic declination ii. Magnetie dip iii. Horizontal component of earth.s magnetic field at a place?

If the total magnetic field at the place is 0.56 G, then calculate the vertical component of Earth's magnetic field at which the dip angle is 30^(@) .