A dip needle in a plane perpendicular to magnetic meridian will remain

A dip needle free to move in a vertical plane perpendiculr to the magneetic meridian will remain

The dip at a place is delta . For measuring it, the axis of the dip needle is perpendicular to the magnetic meridian. If the axis of the dip needle makes angle theta with the magnetic meridian, the apparent dip will be given by tan delta_1 =

The dip at a place is delta. For measuring it, the axis of the dip needle is perpendicular to the magnetic meridian. If the axis of the dip needle makes angle theta with the magnetic meridian, the apparent dip will be given tan delta_(1) which is equal to:

The dip at a place is delta. For measuring it, the axis of the dip needle is perpendicular to the magnetic meridian. If the axis of the dip needle makes angle theta with the magnetic meridian, the apparent dip will be given tan delta_(1) which is equal to: