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State the elements of Earth's magnetic f...

State the elements of Earth's magnetic field .

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There are three quantities required to specify the magnetic field of the Earth on its surface, which are often called as the elements of the Earth's magnetic field . They are
(a) magnetic declination (D)
(b) magnetic dip or inclination (I)
(c ) the horizontal component of the Earth's magnetic field `(B_(H))`
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