A magnet is placed horizontally on ground with its north pole towards the geographic north pole of the earth. The neutral point is obtained

The angle of dip at a place is $60°$. At this place the total intensity of earth's magnetic field is $0.64 $ $units$. The horizontal intensity of earth's magnetic field at this place is......$ units$

Isogonic lines on magnetic map will have

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 bar magnet of length $14 \,cm$ is placed in the magnetic meridian with its north pole pointing towards the geographic north pole. A neutral point is obtained at a distance of $18\, cm$ from the center of the magnet. If $B _{ H }=0.4 \,G ,$ the magnetic moment of the magnet is $\left(1\, G =10^{-4} T \right)$

A short bar magnet is placed in the magnetic meridian of the earth with north pole pointing north . Neutral points are found at a distance of $30\, cm$ from the magnet on the East - West line, drawn through the middle point of the magnet. The magnetic moment of the magnet in $Am^2$ is close to: (Given $\frac{{{\mu _0}}}{{4\pi }}\, = 10^{- 7}$ in $SI\,units$ and $B_H\, =$ Horizontal component field $= 3.6\times10^{-5}\, tesla$)