7Electromagnetic_induction_DC_generator_and_an_electric_engine_presentation

Faraday's law and Lentz’s law-Application

-to explain the received results in a well-argued manner using Faraday's law of induction and Lentz's law.
-apply Faraday’s and Lentz’s law in action

A changing magnetic flux induces an EMF

Why current do induced in the circuit?
How do you name this current?
How to determine the direction of induced current?
Why current is induces when only magnet is in action?

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Looks like potential. It’s a “driving force” for current

A changing magnetic flux induces an EMF, a curling E field

Analogous to Electric Flux (Gauss’ Law)

(1) Uniform B

(2) Non-Uniform B

Induced EMF is in direction that opposes the change in flux that caused it

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Changing magnetic flux induces an EMF

Lenz: Induction opposes change

Quantities which can vary with time:

Magnitude of B
Area A enclosed by the loop
Angle q between B and loop normal

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Many Applications of Faraday’s Law

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Pickups

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