All Flashcards
What is the difference between Faraday's Law and Lenz's Law?
Faraday's Law: Quantifies the induced EMF. | Lenz's Law: Determines the direction of the induced EMF (opposes change in flux).
Compare voltage step-up and step-down transformers.
Step-Up: More loops on the secondary side. | Step-Down: More loops on the primary side.
Define Electromagnetic Induction.
Generating a voltage using magnetic fields. If this voltage is in a complete circuit, it creates a current.
What is Magnetic Flux?
A measure of the amount of magnetic field lines passing through a given area, calculated as .
Define Faraday's Law.
The induced EMF in any closed circuit is equal to the negative of the time rate of change of the magnetic flux through the circuit: .
What is Lenz's Law?
The induced EMF always opposes the change in magnetic flux that caused it.
Define Motional EMF.
EMF generated by moving an object (like a conducting rod) in a magnetic field.
What is a Weber (Wb)?
The SI unit of magnetic flux, equivalent to Tm².
What are the differences 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 voltage step-up and step-down in transformers.
Step-Up: More loops on the secondary side, increases voltage. | Step-Down: More loops on the primary side, decreases voltage.