# physics

posted by
**joshua** on
.

A long straight wire of radius R = 1 cm carries a total current I = 1 Amp

which flows uniformly through the cross-section of the wire. Draw a diagram of this wire and the

current and the magnetic field which is produced. Using Ampere’s law solve for the magnitude of

the magnetic field as a function of the radial distance for both the cases r < R and r > R. With

pencil and paper, plot this magnitude as a function of the radial distance r (with the vertical

coordinate being |~B| and the horizontal coordinate being r).