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How many quantities are required to specify the magnetic field of the earth?

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in Physics – Class 12 by (135k points)
How many quantities are required to specify the magnetic field of the earth?

(a) 1

(b) 2

(c) 3

(d) 4

The question was posed to me in a job interview.

This intriguing question originated from Earth’s Magnetism topic in chapter Magnetism and Matter of Physics – Class 12

1 Answer

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Best answer
The correct answer is (c) 3

To elaborate: Three quantities are needed to specify the magnetic field of the earth on its surface, namely, the horizontal component, the magnetic declination and the magnetic dip. These are known as elements of the earth’s magnetic field or magnetic elements.

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