At a certain place the angle of dip 300 and the horizontal component of earth's magnetic field is 0.50 oerested. The earths's total magnetic field (in oerested) is (A) √3 (B) 1 (C) (1/√3) (D) 1/2

We know that,

On substituting 

We get,

Therefore, the earth’s total magnetic field is (1/√3)

So, the correct option is (C)

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