A loop of diameter d is placed at a distance 9d from a long straight wire. A current of 20 A flows both in the wire and in the loop, as shown in the figure. The loop feels a torque of 5.0 × 10' -6 'Nm. 9d Wire (a) Is the torque felt by the loop clockwise or counterclockwise? Explain. (b) Find the diameter d of the loop.

The figure below is a cross-sectional view of a coaxial cable. The center conductor is surrounded by a rubber layer, an outer conductor, and another rubber layer. In a particular application, the current in the inner conductor is I, = 1.16 A out of the page and the current in the outer conductor is I, = 2.98 A into the page. Assuming the distance d = 1.00 mm, answer the following. d. d (a) Determine the magnitude and direction of the magnetic field at point a. magnitude HT direction ---Select--- (b) Determine the magnitude and direction of the magnetic field at point b. magnitude PT direction ---Select---

"1 @ 2 W S d X The figure is a cross section through three long wires with linear mass density 54.0 g/m. They each carry equal currents in the directions shown. The lower two. wires are 4.0 cm apart and are attached to a table. ( Figure 1) Figure ** #1 m 3 E D 8.0 F3 $ 4 R F a FA C JL V 1 of 1 % 5 T S FS G A 6 B Part A What current I will allow the upper wire to "float" so as to form an equilateral triangle with the lower wires? Express your answer with the appropriate units. Fo Y Provide Feedback HÅ Value Submit Request Answer H & 7 N 84 F7 U J Units 8 DII FB I M 9 K ? DD F9 O 1 delet

Suppose in the figure that the four identical currents i = 20 A, into or out of the page as shown, form a square of side 76 cm. a) What is the force per unit length (magnitude and direction) on the wire in the bottom left hand corner? (N/m) Take the positive y direction as up and the positive x direction as to the right. b)What is the magnitude of the force per unit length?  c)What is the x component of the force per unit length?  d)What is the y component of the force per unit length?