The angle of dip is the angle
Between the vertical component of earth's magnetic field and magnetic meridian
Between the vertical component of earth's magnetic field and geographical meridian
Between the earth's magnetic field direction and horizontal direction
Between the magnetic meridian and the geographical meridian
At the magnetic north pole of the earth, the value of horizontal component of earth's magnetic field and angle of dip are, respectively
At a point on the surface of the earth, the value of the horizontal component of earth's magnetic field is equal to value of vertical magnetic component of earths magnetic field the angle of dip is
The line on the earth's surface joining the points where the field is horizontal is
The vertical component of earth's magnetic field is zero at or The earth's magnetic field always has a vertical component except at the
A compass needle of oscillation magnetometer oscillates $20$ times per minute at a place $P$ of dip $30^{\circ}$. The number of oscillations per minute become $10$ at another place $Q$ of $60^{\circ} dip$. The ratio of the total magnetic field at the two places $\left(B_{Q}: B_{p}\right)$ is.