Two long, parallel wires are hung by cords of length 6.0cm. Each wire has a mass per unit length of 25g/m, and they carry the same current in opposite directions. What is the current if the cords hang at 9.0° with respect to the vertical

The figure below shows two long, parallel wires in cross-section, and the currents they carry are directed out of the page. The left wire carries a current of I1 = 2.96 A,and the right carries a current of I2 = 3.50 A.The two wires are a distance          d =20.0 cm apart. Point P is the same distance d above the right wire.Assume the +x-direction is to the right, and the +y-direction is upward. What are the magnitude (in T) and direction (in degrees) of the net magnetic field due to the two wires at a point P? Measure the angle counterclockwise from the positive x-axis, with point P at the origin of the coordinate system. (Ignore the magnetic field due to the Earth.)

The circuit in the figure below is located in a magnetic field whose magnitude varies with time according to the expression B = 1.00 x 10³ t, where B is in teslas and t is in seconds. Assume the resistance per length of the wire is 0.099 /m. Find the current in section PQ of length a = 60.0 cm. magnitude μA direction from Q to P a xxxxx * * * ** x Bin * * x X xx * * * xx x X xx 2a x x x x xx P xxxx xxxx **** * x x x x Q a

The loop in the figure is being pushed into the 0.20 T magnetic field at 45 m/s . The resistance of the loop is 0.50 N. (Figure 1) You may want to review (Pages 849 - 851) . Figure 1 of 1 V В 5.0 cm

A coil with the radius of 20 cm has 10 turns and carries a current of 4 A. A charged particle whose charge equals 60 µ C moves at 1500 m/s through the center of the coil at an angle of 300 to the axis. Compute the magnitude of the force exerted on the particle.

Two power lines run parallel for a distance of 283 m and are separated by a distance of 40.0 cm. If the current in each of the two lines is 115 A and if they run in opposite directions, determine the magnitude and direction of the force each wire exerts on the other.

As seen in Figure 2, a rod with minimal resistance rotates at an angular velocity of @= 5.0 rad/s across a circular area with a radius of a = 0.2 m. A second rod with low resistance is immobile. Two rods are interconnected in the middle of a circle. A magnetic field with a strength of B = 0.3 T permeates the paper. r = 0.40 m/m is the resistance per unit length of the circular arc. Determine the induced emf and current direction. Indicate the induced current and its direction on the diagram. X X X-X X X x xx xx x X X B xx x X XXX x x X X X X X X X Fig 2. Problem 2

Consider a 150 turn square loop of wire 16 cm on a side that carries a 56 A current in a 1.75 T field. l = 16 cmI = 56 AB = 1.75 T a. What is the maximum torque on the loop of wire in N⋅m?  b. What is the magnitude of the torque in N⋅m when the angle between the field and the normal to the plane of the loop θ is 14°?

A piece of copper wire has a resistance per unit length of 8.70 x 10 o/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.146 m. The ends of the wire are connected to a 12.0-V battery. Find the magnetic field strength at the center of the coil. Number Units

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 I1 = 1.14 A out of the page and the current in the outer conductor is I2 = 2.90 A into the page. Assuming the distance d = 1.00 mm, answer the following.(a) Determine the magnitude and direction of the magnetic field at point a.find magnitude ut and direction(b) Determine the magnitude and direction of the magnetic field at point b.find magnitude ut and direction