Two long, straight, parallel wires are 1.00 m apart (Fig.). The wire on the left carries a current I1of 6.00 A into the plane of the paper.
(a) What must the magnitude and direction of the current s I2 be for the net field at point P to be zero?
(b) Then what are the magnitude and direction of the net field at Q?
(c) Then what is the magnitude of the net field at S?

0.60 m 0.50 m 0.80 m 0.50 m 1,00 m e 1,= 6.00A