he magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius of 0.700 m and an outer radius of 1.30 m. The toroid has 840 urns of large-diameter wire, each of which carries a current of 12.0 kA. (a) Find the magnitude of the magnetic field inside the toroid along the inner radius. (b) Find the magnitude of the magnetic field inside the toroid along the outer radius. T

A ring of radius 8.0 cm is placed concentrically around a ring of radius 6.0 cm (see figure below). Each ring carries a current of 4.0 A.(a) What is the magnitude of the magnetic field at the center of the rings if the two currents flow in the same direction?(b) Find the magnitude of the magnetic field if the currents flow in opposite directions?(c) If the outer ring current is counterclockwise and the inner ring current is clockwise what is the direction of the net magnetic field

What is the magnetic field at the origin due to a 2 m radius semicircular piece of wire carrying 4 amps. The wire is in the x-y plane and carries current from x=-3 m, through y=4m, and to x = 5 m. (It is the positive y half of a circle centered at the origin.)

You make a solenoid with 500 turns of wire. The solenoid has a radius of 1.5 cm.  You then curve this solenoid into a circle with a radius of 8.5 cm, and run a current of 3.0 Amps through the resulting toroid.  What is the magnetic field inside the tube of the toroid?

A metal rod of 2.50m long stands vertically near the earth’s equator carrying a current of10.0A away from the ground. The earth’s magnetic field at the location has a magnitude of 0.500 10 to negative 4th power Tand points directly to the north. (a) what is the smallest angle between the current inthe rod and the magnetic field of Earth at that location? (b) What is the magnitude of the magneticforce on the rod? (c) What is the direction of the magnetic force on the rod?

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?

Which describes the net force on a magnetic dipole in a uniform magnetic field? The net force vector is in the direction of the magnetic field. O The net force vector is in the direction opposite that of the magnetic field. The net force vector is perpendicular to the direction of the magnetic field. O The net force vector is zero.