At the magnetic poles of the Earth,the angle of dip is .....$^o$.

The vertical component of the Earth's magnetic field is zero at:

The intensity of the magnetic field due to the Earth at a point inside a hollow steel box is:

What is the most accepted scientific explanation for the origin of the Earth's magnetic field?

If $\theta_1$ and $\theta_2$ are the apparent angles of dip observed in two vertical planes at right angles to each other,then the true angle of dip $\theta$ is given by:

$A$ compass needle whose magnetic moment is $60 \, A \cdot m^2$ is pointing towards the geographical north at a certain place,where the horizontal component of the Earth's magnetic field is $40 \, \mu Wb/m^2$. It experiences a torque of $1.2 \times 10^{-3} \, N \cdot m$. What is the angle of declination at this place (in $^o$)?