I need help correcting these questions.

1#

\fFigure (a) shows an element of length ds = 1.07 um in a very long straight wire carrying current. The current in that element sets up a differential magnetic field d B at points in the surrounding space. Figure (b) gives the magnitude dB of the field for points 5.1 cm from the element, as a function of angle 0 between the wire and a straight line to the point. The vertical scale is set by dB, = 62.4 pT. What is the magnitude of the magnetic field set up by the entire wire at perpendicular distance 5.1 cm from the wire? ds- Wire (a) dB, dB (pT) 0 1/2 0 (rad) (b) Number 5.65E-4 Units Tom VA straight conductor carrying a current i = 6.3 A splits into identical semicircular arcs as shown in the figure. What is the magnetic field at the center C of the resulting circular loop, which has a radius of 2.7 cm? Number i 2.15E-5 Units TThree long wires all lie in an xy plane parallel to the x axis. They intersect the y axis at the origin, y = d, and y = 2d, where d = 13 cm. The two outer wires each carry a current of 3.8 A in the positive x direction. What is the magnitude of the force on a 1.7 m section of either of the outer wires if the current in the center wire is 3.6 A (a) in the positive x direction and (b) in the negative x direction? (a) Number i 5.47E-4 Units N (b) Number 16.9E-6 Units N