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At a certain place the angle of dip is 3...

At a certain place the angle of dip is `30^@` and the horizontal component of earth's magnetic field is 0.50 oersted the earth's total magnetic field (in oersted) is

A

`sqrt3`

B

1

C

`1/sqrt3`

D

(1/2)

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The correct Answer is:
C
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