4:! = ' =I' We will use the \"right-hand rule\" 1 RHR] [pictured here) to determine the direction of the magnetic eld around a current carrying wire. Pictured below is a wire carrying current to the le. 1} Using RHRI determine the direction of the magnetic field above the wire? Do the same below the wire. 3 l( 2) The magnitude of the E eld produced by a long straight current is given by the Biot-Savart Law: _. ,ul' B = I I 2H1" where I is the electric current in the wire, 1" is the distance from the wire, and an is a constant termed the permeabifigr offree space. In SI units, pig = 1141: X 104'?" - mfA. What happens to the strength of the magnetic field as you move away from the wire pictured above? 3} What happens if you change the direction of current