Question

Tangent law is applicable only when

• A. applied field is parallel to the earth's horizontal component
• B. applied field is antiparallel to the earth's horizontal component
• C. applied field is perpendicular the earth's horizontal component in horizontal plane
• D. applied field is inclined to the earth's horizontal component

Answer 1

The correct option is C applied field is perpendicular the earth's horizontal component in horizontal plane

$\text{Tangent Law}$ : When a magnet is placed in two perpendicular magnetic fields in the same plane, the magnet makes an angle $\theta$ with the magnetic field given by
$B=B_H\tan \theta$