All Flashcards
What happens when magnetic flux through a loop increases?
The induced magnetic field points in the opposite direction to the applied field.
What happens when magnetic flux through a loop decreases?
The induced magnetic field points in the same direction as the applied field.
What is the effect of a changing magnetic flux?
It induces an electromotive force (EMF) in a nearby conductor.
What causes an induced current?
An induced EMF in a closed circuit.
What is the effect of an induced current?
It creates its own magnetic field that opposes the change in the original magnetic flux.
What is the effect of moving a conductor through a magnetic field?
It induces a current in the conductor.
What is Magnetic Flux (Φ)?
The amount of magnetic field passing through a given area;
Define Faraday's Law.
A changing magnetic flux through a loop induces an electromotive force (emf):
What is Lenz's Law?
The induced emf creates a current that produces a magnetic field opposing the change in magnetic flux.
Define induced EMF.
The electromotive force generated in a circuit due to a changing magnetic field.
What is an area vector?
A vector perpendicular to the surface, pointing outward from a closed surface; used to determine the sign of magnetic flux.
What are the differences between generators and transformers?
Generators: Convert mechanical energy to electrical energy. | Transformers: Change the voltage of alternating current.
Compare increasing vs. decreasing magnetic flux regarding induced magnetic field direction.
Increasing Flux: Induced field opposes the applied field. | Decreasing Flux: Induced field is in the same direction as the applied field.