EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is the angle between the geographic poles with the magnetic poles.
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They are magnetic waves that protect our planet from solar radiation.
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They are the points near to theExtremities of the axis Earth’s rotation, North and South.
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None of the above
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Detailed explanation-1: -Magnetic declination at a point on earth is the angle between the earth’s geographic & magnetic meridian at that point. Meridians can be thought of as great circles that pass through a point on earth and either the geographic or the magnetic poles.
Detailed explanation-2: -The axis of the Earth’s magnetic field is inclined at an angle of about 15 degrees with the geographical axis.
Detailed explanation-3: -For example, a compass positioned between the magnetic and the geographical North Pole will point due south, towards the magnetic pole and away from the geographical pole, amounting to a magnetic declination of around 180°.
Detailed explanation-4: -The angle between geographic and magnetic meridian is called angle of dip.
Detailed explanation-5: -The geographical axis (or rotational axis) crosses the surface of the Earth, by definition of geographical latitude at 90°N and 90°S. Thus the angle between the magnetic dipole axis of the Earth and the geographic axis is thus 90°−80. 31°=9. 69°.