Name: Magnetisation
Uploaded: 2019-07-19
Duration: 8 min 32 s
Description: We call the process that makes a material magnetic "magnetisation." In this video, let's explore magnetisation and learn how to express it mathematically.

Question

Explain the elements of the Earth's magnetic field and draw a sketch showing the relationship between the vertical component, horizontal component and angle of dip.

Accepted Answer

The elements of Earth's magnetic field are magnetic declination, magnetic inclination, horizontal component.

Magnetic declination: The small angle between magnetic axis and geographic axis at a place is defined as magnetic declination at that place.

Magnetic Inclination: Magnetic dip, dip angle, or magnetic inclination is the angle made with the horizontal by the compass needle of a vertically held compass. This angle varies at different points on the Earth's surface. Positive values of inclination indicate that the magnetic field of the Earth is pointing downward, into the Earth, at the point of measurement. The value can be measured with an instrument typically known as a dip circle.

At the equator, the magnetic field is parallel to the horizon, so there will be zero angle of dip.

At poles the magnetic field is almost vertical, here the dip will be maximum.

Horizontal component : It is the component of earth’s magnetic field along the horizontal direction.

So the angle of dip is the angle between earth’s magnetic field and the horizontal component.

Explain the elements of the Earth's magnetic field and draw a sketch showing the relationship between the vertical component, horizontal component and angle of dip.

Important Questions on Magnetism and Matter

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