Lenz's Law
- Lenz's Law:
The induced current will appear in such a direction that it opposes the change in flux that produced it.
Conservation of energy considerations:
Claim: Direction of induced current must be so as to oppose the change; otherwise conservation of energy would be violated.
- Why???
- If current reinforced the change, then the change would get bigger and that would in turn induce a larger current which would increase the change, etc..
http://wug.physics.uiuc.edu/courses/phys112/fall97/acts/lect16/act16a/sld001.htm