Question

Determine the horizontzal component of earths magnetic field using tangent laws

Answer 1

Answer:

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The horizontal component of earth's magnetic field, BH, is the projection of earth's magnetic field

The horizontal component of earth's magnetic field, BH, is the projection of earth's magnetic field on surface of the earth. Earth’s magnetic field varies with longitude and latitude.

Explanation:

Tangent law:

When a magnetic needle or magnet is freely suspended in two mutually perpendicular uniform magnetic fields, it will come to rest in the direction of the resultant of the two fields.

Let B be the magnetic field produced by passing current through the coil of the tangent Galvanometer and BH be the horizontal component of earth’s magnetic field. Under the action of two magnetic fields, the needle comes to rest making angle θ with BH, such that...

B = BH tan theta

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