A short bar magnet placed in a horizontal plane has its axis aligned along the magnet north - south direction . Null points are found on the axis of the of the magnet at $14\;cm$ from the center of the magnet . The earth magnetic field at the place is $0.36\;G$ and the cycle of dip is zero. What is the total magnetic field on the normal bisector of the magnet at the same distance as the null - point (14 cm) from the centre of the magnet?

Question

$\begin{array}{1 1} \text{(i)magnitude : 0.54 G (ii) direction : along the direction of earth's field} \\ \text{(i)magnitude : 5.4 G (ii) direction: opposite to the direction of earth's field } \\\text{(i)magnitude : 0.54 G (ii) direction along the direction of earth's field} \\\text{ (i)magnitude : 0.54 G (ii) direction along the direction of earth's field} \end{array} $