28-12-2012, 07:00 PM
Faraday’s law
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Electromagnetic Induction
Faraday’s Law
This phenomena is called electromagnetic induction and is described by Faraday’s law. Write Faraday’s law.
In order to understand Faraday’s law we need to understand the concept of magnetic flux. Write the definition of magnetic flux.
The magnetic flux is exactly like the electric flux we studied in Gauss’s law. The flux is defined in terms of a vector area dA. Describe the magnitude and direction of this vector.
Lenz’s Law
The direction of the emf and thus the current is given by Lenz’s law. The statement in bold in the center of page 789 is a statement of Lenz’s law. Use this to find the direction of the current. If you are looking down on the loop from above, is the current flowing clockwise or counter clockwise? Explain.