Two parallel wires P and Q placed at a separation of r = 6 cm carry electric currents I1 = 5A and I2 = 2A in opposite directions as shown in figure.

Question : Two parallel wires P and Q placed at a separation of r = 6 cm carry electric currents I1 = 5A and I2 = 2A in opposite directions as shown in figure. Find the point on the line PQ where the resultant magnetic field is zero.