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the closed line integral of electric field equals the change of magnetic flux with respect to time (times a stupid constant). In qualitative terms, change in magnetic flux equals circulation of electric field. And the opposite is true -- change in electric flux equals circulation of magnetic field. These are two of the fundamental laws in electromagnetism.


(the integral form rather than differential form is used for better understanding, I bet these notations can be understood by a student taking A.math in the cert level.)
And the presence of electric field (caused by change in magnetic flux with respect to time, as explained) means a non-zero potential difference -- voltage. However, induced voltage does not always guarantee an induced current, the latter is true only when there exist a pathway that charge carriers can "move".
note: the line integral of electric field (though a closed line of integration is not needed) is the definition of voltage
[ 本帖最後由 kyva1929 於 10-1-8 11:42 PM 編輯 ] |
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