PHYS208 4/13 Class
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Applications of Ampere's Law
![[Ampere's law]](formulas/ampere.gif)
The Solenoid
A solenoid is generally a tightly-wound helical coil of wire, with a length much
greater than its diameter. Working on pictures; text to come...
![[solenoid]](images/solenoid0.gif)
![[solenoid]](images/solenoid1.gif)
![[solenoid]](images/solenoid2.gif)
![[solenoid close-up]](images/solenoid3.gif)
Individual contributions to B of a solenoid.
![[solenoid B field]](images/solenoid4.gif)
Symmetry of B in a long solenoid.
![[solenoid amperian loop]](images/solenoid5.gif)
Choice of amperian loop for determining B of a long solenoid.
![[short solenoid]](images/short-solenoid.gif)
Magnetic field lines for a short solenoid.
Adpated from HRW, Fig. 30-19
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"http://www.physics.udel.edu/~watson/phys208/clas0413.html"
Last updated April 13, 1998.
Copyright George Watson, Univ. of Delaware, 1997.