The angle of dip at a certain place is $30^o$. If the horizontal component of the earth’s magnetic field is $H, $ the intensity of the total magnetic field is
The angle of dip at a certain place is $30^o$. If the horizontal component of the earth’s magnetic field is $H, $ the intensity of the total magnetic field is
- A
$\frac{H}{2}$
- B
$\frac{{2H}}{{\sqrt 3 }}$
- C
$H\sqrt 2 $
- D
$H\sqrt 3 $
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