PQRS is a square of side lo. A, B, C and D are four long current carrying wires kept perpendicular to the plane of paper 4. as shown in the figure. PA = QB = RC = SD = The magnitude of current in the wires A, B, C and D are io, 2io, 8io and 4io respectively, the direction of current are shown. It is A given that (B, di = -9µ, Tesla meter and (B di = 5µ, Tesla meter, where B, and B, are the magnetic fields due to the wires A and B respectively. The magnitude of io is 23 amp (A) (B) (C) 46 amp 23 amp 23 amp 4 (D) ........

PQRS is a square of side lo. A, B, C and D are four long current carrying wires kept perpendicular to the plane of paper 4. as shown in the figure. PA = QB = RC = SD = The magnitude of current in the wires A, B, C and D are io, 2io, 8io and 4io respectively, the direction of current are shown. It is A given that (B, di = -9µ, Tesla meter and (B di = 5µ, Tesla meter, where B, and B, are the magnetic fields due to the wires A and B respectively. The magnitude of io is 23 amp (A) (B) (C) 46 amp 23 amp 23 amp 4 (D) ........