The figure shows the magnetic field of earth.1. Identify the labels A,

1.	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.
Answer» 1. the labels A, B, C: A – Magnetic equator B – Magnetic axis C – Declination 2. Isogonic lines 3. Horizontal component of earth’s magnetic field is B = B_H cosδ 0.25 × 10^-4 = 0.5 × 10^-4 δ δ = 60° Vertical component of earth’s magnetic field is Bv = B sin δ = 0.5 × 10^-4 sin 60 = 0.43 × 10^-4 T.

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.

Answer»

1. the labels A, B, C:

2. Isogonic lines

3. Horizontal component of earth’s magnetic field is

B = B_H cosδ

0.25 × 10^-4 = 0.5 × 10^-4 δ

δ = 60°

Vertical component of earth’s magnetic field is

Bv = B sin δ = 0.5 × 10^-4 sin 60 = 0.43 × 10^-4 T.