This symmetry causes physicists to speak of the electromagnetic force and not consider it as two separate forces. The direction of the magnetic field may be found by the famous Left-Hand Rule . Find the direction of the field around this current-carrying wire. Find the direction of the current flow that would produce the B-field shown. A charge q travels parallel to a wire with a velocity v. The wire, meanwhile, carries a current i.
L lies at a distance r from an infinite wire carrying a current i.
8 cm from a long wire carrying 4.4 amps is a little circle of wire of 3 mm radius. Both currents are coming out of the page. Two wires, carrying 4 A and 2 A, are crossed as shown. Find the magnetic field strength at points a and b. 9. A 17 cm length of wire masses 2.0 gm.