Magnetic meridian is a
Point
Horizontal plane
Vertical plane
Line along $N-S$
The earth's magnetic field lines resemble that of a dipole at the centre of the earth. If the magnetic moment of this dipole is close to $8 \times 10^{22}\, Am^2$, the value of earth 's magnetic field near the equator is close to....$Gauss$ (radius of the earth $= 6.4 \times 10^6\, m$)
Assertion : The true geographic north direction is found by using a compass needle.
Reason : The magnetic meridian of the earth is along the axis of rotation of the earth.
Isogonic lines on magnetic map will have
Lines which represent places of constant angle of dip are called
The lines joining the places of the same horizontal intensity are known as