Three long, straight, parallel wires all lie in the yz-plane and each carries a
current of 20 A in the positive z direction. The two outer wires are each 4.0 cm from the center wire. What is the magnitude of the magnetic force on a 50-cm
length of either of the outer wires?
Answers
Three long, straight, parallel wires all lie in the yz plane and each carries a current of 20 A in the positive z direction. The two outer wires arc each 4.0 cm from the center wire. What is the magnitude of the magnetic force on a 50-cm length of either of the outer wires? 1.0 mN 0.50 mN 1.1 mN 1.5 mN 2.0 mN A long, straight wire (radius = 2.0 mm) carries a current of 2.0 A distributed uniformly over a cross section perpendicular to the axis of the wire. What is the magnitude of the magnetic field at a distance of 1.0 mm from the axis of the wire? 0.40 mT 0.80 mT 0.10 mT 0.20 mT 0.75 mT A toroid is made of 2 000 turns of wire of radius 2.00 cm formed into a donut shape of inner radius 10.0 cm and outer radius 14.0 cm. When a 30.0-A current is present in the toroid, the magnetic field at a distance of 11.0 cm from the center of the toroid is 0.0857 T. 0.109 T. 0.120 T. 0.600 T. 0.685 T.