Question

At a place the angle of dip is ${30}^o$ . If the horizontal component of the earth's magnetic field is $H$, then the total field intensity will be given by

• A. $\frac{H}{2}$
• B. $\frac{2H}{\sqrt{3}}$
• C. $\frac{H}{\sqrt{2}}$
• D. $H\sqrt{2}$

Answer 1

The correct option is B $\frac{2H}{\sqrt{3}}$

$I\cos {30}^o=H$
$I\frac{\sqrt{3}}{2}=H$
I $=$ $\frac{2H}{\sqrt{3}}$