Q. At a place, the magnitudes of the horizontal component and total intensity of the magnetic field of the earth are 0.3 and 0.6 $oersted$ respectively. The value of the angle of dip at this place will be
A) $60{^\circ}$
B) $45{^\circ}$
C) $30{^\circ}$
D) $0{^\circ}$
Explanation
(a) $B_{H} = 0.3\ oersted,\ I = 0.6\ oersted$
We have $B_{H} = I\cos\phi \Rightarrow \cos\phi = \frac{B_{H}}{I} = \frac{0.3}{0.6} = \frac{1}{2}$
$\therefore\phi = 60{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.