The figure shows the magnetic field of earth.
1. Identify the labels A, B, C.
2. The lines drawn on a map through places that have the same declination are called………
3. The horizontal component of earth’s magnetic field at a place is 0.25 × 10-4T and the resultant magnetic field is 0.5 × 10-4 T.
Find the dip and the vertical component of the earth’s magnetic field at the place.