A dip needle arranged to move freely in the magnetic meridian dips by an angle `theta`. The vertical plane in which the needle moves is now rotated through an angle `alpha` from the magnetic meridian. Through what angle the needle will dip in the new position?

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

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

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

A dip circle is so set that the dip needle moves freely in the magnetic meridian. In this position the angle of dip is 39^(@) . Now, the dip circle is rotated so that the plane in which the needle moves makes an angle of 30^(@) with the magnetic meridian. In this position, the needle will dip by an angle -

A dip circle is adjusted so that its needle moves freely in the magnetic meridian. In this position, the angle of dip ia 40^(@) . Now the dip circle is rotated so that the plane in which the needle moves makes an angle of 30^(@) with the magnetic meridian. In this position the needle will dip by an angle

A dip circle is adjusted so that its needle moves freely in the magnetic meridian. In this position, the angle of dip ia 40^(@) . Now the dip circle is rotated so that the plane in which the needle moves makes an angle of 30^(@) with the magnetic meridian. In this position the needle will dip by an angle

A dip circle is adjusted so that its needle moves freely in the magnetic meridian. In this position, the angle of dip ia 45^(@) . Now the dip circle is rotated so that the plane in which the needle moves makes an angle of 30^(@) with the magnetic meridian. In this position the needle will dip by an angle