A long wire, lying on the x axis carries a current I, =15A in the positive x-direction. A second wire lies on the y axis and carries a current I, = 20A in the positive y-direction as shown. Determine the magnetic field (magnitude and direction) at a point P that is 30cm from the x-axis and 20cm from the y-axis.

Parallel wires that are a distance, d = 20 cm, apart carry different amounts of current in opposite directions as shown in the figure.Top wire carries current, I1 = 50 A, to the right while that in the bottom one, I2 = 10 A, flows left. Determine the magnitude and direction of the net magnetic field at a point midway between the two wires.

The magnetic field 38.0 cm away from a long, straight wire carrying current 3.00 A is 1580 nT. (a) At what distance is it 158 nT? cm (b) At one instant, the two conductors in a long household extension cord carry equal 3.00-A currents in opposite directions. The two wires are 3.00 mm apart. Find the magnetic field 38.0 cm away from the middle of the straight cord, in the plane of the two wires. nT (c) At what distance is it one-tenth as large? cm (d) The center wire in a coaxial cable carries current 3.00 A in one direction, and the sheath around it carries current 3.00 A in the opposite direction. What magnetic field does the cable create at points outside the cables? nT

Consider a wire segment carrying a constant current of 3.0 A as shown on the attached figure. The arc portion of the segment is a 30◦ portion of a circle, the circle has a radius of 0.60 m. Determine the magnitude and direction of the magnetic field generated by the current at a point P at the center of the circle.

A long straight wire sits on the z-axis and carries a current of 1.46 amps in the positive z direction. Find the magnitude of the magnetic field produced by this current at position (x,y,z) = (-1.44 m, -3.65 m, 6.04 m). Answer in units of T.

magnetic fields Problem 19:   Consider the two wires in the figure, running at a right angle to each other. The wires carry the same current I = 6.5 mA, in the directions shown. The distances shown are d1 = 31 cm and d2 = 11.5 cm.   Part (a)  What is the magnitude of the magnetic field, in tesla, at point A?  Part (b)  What is the magnitude of the magnetic field, in tesla, at point B?  Part (c)  What is the magnitude of the magnetic field, in tesla, at point C?

A wire carrying a current is  shaped in the fom of a circular loop of radius 4.0 mm.  If the magnetic field strength at its center is 1.1 mT with no external magnetic field contributing to it, what is the magnitude of the current that flows through the wire?