The Earth's Magnetism

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The Earth's Magnetism: Overview

This topic covers concepts, such as Terrestrial Magnetism, Dynamo Effect, Dip Circle & Horizontal and Vertical Component of Earth's Magnetic Field etc.

Important Questions on The Earth's Magnetism

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What is the angle of dip at magnetic poles of earth ?

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What can be maximum angle of magnetic declination which is the angle between the true north and the magnetic north?

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Earth's magnetic field has a horizontal component except at

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The angle between the horizon and the Earth's magnetic field can be measured by :

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Assertion: The geographic north-pole does not coincide with the magnetic north pole.

Reason: The axis of the hypothetical dipole inside the earth is tilted by approximately 11.3 with respect to the axis of rotation of the earth.

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The south pole of earth's magnet is in the

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What is the value of the angle of dip at magnetic poles of earth?

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At a given place on the Earth's surface, the horizontal component of earth's magnetic field is 3×10-5 T and resultant magnetic field is 6×10-5 T. The angles of dip at this place is

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At a given place on the Earth, the angle between the Magnetic meridian and the Geographic meridian is called

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The strength of the Earth’s magnetic field is

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At certain place, horizontal component is 13 times the vertical component. The angle of dip is

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The angle of dip at a place is 30° and the intensity of the vertical component of the earth's magnetic field V=6×10-5 tesla. The total intensity of the earth's magnetic field (I) at this place is :

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The Earth's magnetic field always has a horizontal component except at :-

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Assertion : The colourful curtain of green and pink lights in the sky, (which is called "Aurora Borealis") are seen in the polar regions like Alaska and North Canada, but it is not seen in India.

Reason : The earth's magnetic field lines come closer to each other at the magnetic poles, so the charge's density of the charges ejected from the sun, increases near the magnetic poles.

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A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It

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What is the value of the angle of dip at magnetic poles of earth?

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In the magnetic meridian of a certain place, the horizontal component of the earth's magnetic field is 35G and the dip angle of a magnetic needle is 30°. What is the magnetic field of the earth at this location?