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 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.
What is the difference between Faraday's Law and Lenz's Law?
Faraday's Law: Quantifies the induced EMF based on the rate of change of magnetic flux. | Lenz's Law: Determines the direction of the induced EMF, opposing the change in flux.
Compare increasing vs. decreasing flux regarding induced magnetic field.
Increasing Flux: Induced magnetic field points opposite to the applied field. | Decreasing Flux: Induced magnetic field points in the same direction as the applied field.
Compare primary and secondary coils in a transformer.
Primary Coil: Creates a changing magnetic flux when AC voltage is applied. | Secondary Coil: Experiences induced EMF due to changing flux from the primary coil.