JEE Advanced Model Paper 12 with solutions for online practice

Two long conducting wires carrying equal currents are placed to the Z-axis. A charged particle is made to move in a circular path of radius ’a ’ with centre of the path at point (0,2a) in clockwise direction. During the course of motion, it passes throughfour points P,Q,R and S having coordinates (0,a),(—a, 2a), (0,3a) and (a, 2a) respectively. The magnitude of force exerted on the particle by the magnetic field created by the wires is maximum when it passes through points