# Magnetic Declination Formula

## Magnetic Declination Formula

Magnetic declination is the angle on the level plane between magnetic and true north. The declination is positive when the magnetic north is east of the true north and negative when it is west of the true north. Let us now examine the Magnetic Declination Formula.

### What is Magnetic Declination?

It is not constant and varies with the position and time of the Earth. Magnetic declination is referred to as a magnetic variation, and the Greek letter δ is used as a symbol. Furthermore, when the magnetic north is east of true north, the declination is positive; when the magnetic north is west of true north, the declination is negative. This is a part of the Magnetic Declination Formula. It is not very challenging if the Magnetic Declination Formula is learned with the help of the Extramarks platform.

Other terminologies employed include isogonic lines. A constant declination occurs when the lines along the declination remain constant. Then there are agonic lines, which are lines that are zero in length and run parallel to the declination. This is all a part of the Magnetic Declination Formula.

### Types of North

There are three categories of the North in the Magnetic Declination Formula:

True North: The direction along the globe’s surface that leads to the true North Pole, also known as the topographical North Pole, is known as true north. It is also known as geodetic north, and it differs from magnetic north, which is the direction indicated by a compass, and grid north, which is the journey to the north via network lines. This is the first category of North in the Magnetic Declination Formula.

Grid North: Grid north is the direction along the framework lines that points north on a guide projection. Because the divergence between grid north and true north is so small, this phrase is used for routes. This is the second category of North in the Magnetic Declination Formula.

Magnetic North: The compass needle points north due to the earth’s magnetic field. The difference between true north and magnetic north varies from place to place because the world’s magnetic poles are not stable in relation to its pivot. This is the third category of North in the Magnetic Declination Formula.

Magnetic Dip

When the inclination is positive, the world’s magnetic lines are pointing lower or downwards in the northern portion of the globe, and when it is negative, the world’s magnetic lines are facing vertically or upwards in the southern portion of the globe. This is an important concept to learn while studying the Magnetic Declination Formula.

In the year 1581, Robert Norman invented the dip circle, a method of determining the dip angle or magnetic inclination. Two terminologies are used: isoclinic lines (when shape lines at the world’s surface are comparable) and aclinic lines (when shape lines are not comparable) (when the locus of the focus are having zero dips). This is the explanation of the Magnetic Dip. Students can learn more about the Magnetic Declination Formula on the Extramarks platform. The platform is a hub of leaning materials and study guides that can help students get thorough with the Magnetic Declination Formula. This is one of the most crucial topics and students need to be well versed with the Magnetic Declination Formula.

Magnetic Declination Formula

The Magnetic Declination Formula can be learned on the Extramarks platform. The platform covers all the topics of the Physics subject along with the solutions and examples. The examples for Magnetic Declination Formula can help the students learn and understand for examinations better. Studying from the Extramarks platform can help the students with easy learning modules and interactive study guides. These study guides for Magnetic Declination Formula are curated by experts from Extramarks. The doubt clearing sessions are also helpful for students who want to become thorough with the Magnetic Declination Formula. The formula is an integral part of the Physics subject. The subject is considered tough by a number of students, and this can intimidate them for topics like Magnetic Declination Formula.
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### Sample Questions

There are several sample questions on the Extramarks platform that can help students understand the theoretical application of the formula. The formula can be difficult to understand and learn for a number of the students, but the sample questions are drafted by expert academicians who have years of experience.

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