Question 1:

P A straight infinite current-carrying wire is bent into the form shown in the figure above. I = 3 A. The curve is a semicircle of radius a = 75 cm. What is the field at the point P? T out of the page.L Three long, straight wires are located at the corners of an equilateral triangle of side L = 25 cm as shown in the figure above. I1 = 6 A, I2 = 12 A, Is = 2 A a) What is the magnetic field due to I1 and 2 at the position of Is? B = b) What is the magnetic force per meter on the wire with Is? FA = ( + ON/mI Two long wires are parallel to the nuts and are located at 5:: = I}, y in. Take cl. = cm. a] Find B at point? with h 14 cm, given that the wires carry equal currents in opposite direction I1 = I; = SE. B = CPU\" lo] At what point is B equal to 45 t of the magnitude of the magnetic field at origin {I}, ILLI}? (Hint, find the magentic field at origin first.) a C]cm