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\begin{figure}\centerline{ \psfig{file=problems/prob_8_5.eps,height=2.5in} }\end{figure}

a) Find the magnetic field inside the solenoid pictured above, when $N = 1000$ turns and $I = 10$ amps, assuming that it is ``much longer than its diameter''. Indicate its direction on the picture.

b) If a current loop of radius $r$ carrying a current $I_0$ is placed near the end of the solenoid as shown, should it experience a force? Why or why not?

Robert G. Brown 2003-02-09