Difference between revisions of "Lenz's Law"
Jump to navigation
Jump to search
(Added a bit about relation to Faraday's law) |
DavidB4-bot (talk | contribs) (→See also: Spelling, grammar, and general cleanup) |
||
| Line 9: | Line 9: | ||
The minus sign represents Lenz's law, that the induced voltage (and therefore current that might flow) will oppose the flux that is causing it. | The minus sign represents Lenz's law, that the induced voltage (and therefore current that might flow) will oppose the flux that is causing it. | ||
| − | ==See | + | ==See also== |
* [[Gauss's Law|Gauss's law]] | * [[Gauss's Law|Gauss's law]] | ||
* [[Ampere's law]] | * [[Ampere's law]] | ||
Latest revision as of 23:37, July 12, 2017
Lenz's Law is a law which was published in 1833 by Emil Lenz. It determines the direction of the electric current in electromagnetic induction. The law says:
| “ | The induced current is always directed such that it always acts contrary to its cause. | ” |
It is necessary for there to be conservation of energy. It comes from the fact that the induced current produces a magnetic field in addition to the one that caused the induced current. Faraday's law describes induction mathematically relating the voltage induced, V, to the magnetic flux, ΦB , as:
<math> V = \frac{d \phi_B}{dt} </math>
The minus sign represents Lenz's law, that the induced voltage (and therefore current that might flow) will oppose the flux that is causing it.