Magnetic lines of strength

Question 1

What are the two parameters that describe magnetic orientation?

Answer 1

Inclination and Declination

Question 2

What is the inclination?* What does it represent?

Answer 2

Inclination refers to the angle between the magnetic field lines of the Earth and the horizontal plane at a specific location. It represents the tilt of the magnetic field

Question 3

What is the declination?*

Answer 3

Declination represents the horizontal angle between the direction of true north and the direction of the magnetic north. It describes the deviation of the Earth’s magnetic field from geographic or true north at a specific location.

Question 4

What is inclination and declination of north magnetic pole?

Answer 4

+90° inclination and 0° declination

Question 5

What is inclination and declination of south magnetic dip pole?

Answer 5

-90° and 0°

Question 6

When is it defined as positive?

Answer 6

When the inclination is pointing into the earth (north pole)

Question 7

When is it defined as negative?

Answer 7

When the line is pointing out of the earth from the outer core (south pole)

Question 8

Why does declination vary?

Answer 8

Declination angle varies globally and changes over time due to the movement of the Earth’s magnetic poles.

Question 9

What two things can declination be? why?

Answer 9

It can be positive (east declination) or positive (west declination) depending on whether the magnetic north is to the east or west of true north.