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Question

Physics Question on Magnetism and matter

At a certain place, the angle of dip is 30∘30^{\circ} and the horizontal component of earth?? magnetic field is 0.50 oersted. The earth?? total magnetic field (in oersted) is

A

3\sqrt{3}

B

1

C

1/3 1 / \sqrt{3}

D

12\frac{1}{2}

Answer

1/3 1 / \sqrt{3}

Explanation

Solution

R=Hcos⁡δ=0.50cos⁡30∘=0.50×23=1/3R = \frac{H}{\cos\delta} = \frac{0.50}{\cos 30^{\circ}} = \frac{0.50 \times2}{\sqrt{3}} = 1/\sqrt{3}