Physic

1. (20 points) In the figure, three long straight wires are perpendicular to the page with R = 15.0 cm and I1 = 3.14 A, I2 = 6.28 A, and 13 = 9.42 A. The current is into the page in wires 1 and 2 and out of the page in wire 3. (a) What are the magnitude and direction of the net magnetic field at point P due to the three wires? (b) What are the magnitude and direction of the magnetic force per meter of wire length on wire 1 from the other wires? (c) If an electron was shot horizontally to the right at point P with initial velocity v = (2.20 x 105 m/s)i, what are the magnitude and direction of the force it will experience at point P? - - - P I1 - --- 2R 12 13 R