The lines of force due to earth’s horizontal magnetic field are 

At a place the horizontal component B_o and vertical component V_o of the earth’s magnetic field are equal in magnitude. The total intensity at a place is

Choose the right one from the following. A deflection magnetometer can be used for measuring 

At a place the angle of dip is 30^o. If the horizontal component of earth’s magnetic field is H, the total earth’s field will be  

At a certain place the magnetic fields horizontal component is B_H and the angle of dip is 45^o. The earth’s total field at that place is

At a certain place the horizontal component of earth’s magnetic field is a √3 time the vertical component, the angle of dip is

If a magnet is suspended at an angle 30° to the magnetic meridian, the dip needle makes an angle of 60° with the horizontal. What is the true value of dip?

The angle between the magnetic meridian and geo meridian is known as 

What is the angle of dip in the above question?

A dip needle lays initially in the magnetic meridian it shows an angle of θ at a place. When the dip circle is rotated through an angle of α in the horizontal plane, it shows an angle of dip θ’. Then, tan θ/tan θ’ is,