If a magnet is suspended at an angle $30^o$ to the magnetic meridian, it makes an angle of $45^o$ with the horizontal. The real dip is
${\tan ^{ - 1}}(\sqrt 3 /2)$
${\tan ^{ - 1}}(\sqrt {3)} $
${\tan ^{ - 1}}(\sqrt {3/2} )$
${\tan ^{ - 1}}(2/\sqrt 3 )$
Intensity of magnetic field due to earth at a point inside a hollow steel box is
A compass needle will show which one of the following directions at the earth's magnetic pole
Two normal uniform magnetic field contain a magnetic needle making an angle $60°$ with $F$. Then the ratio of $\frac{F}{H}$ is
The value of horizontal component of earth's magnetic field at a place is $0.35 \times 10^{-4} \,T$. If the angle of dip is $60^{\circ}$, the value of vertical component of earth's magnetic field is nearly ............. $\times 10^{-4} \,T$
Planets producing larger magnetic field have larger