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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.
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.
What are three ways to change magnetic flux?
1. Changing the magnetic field strength (B). 2. Changing the area (A) of the loop in the field. 3. Changing the angle (θ) between the field and area.
Describe how a motional EMF flashlight works.
A metal bar moves, sweeping area A = lΔx. The increasing area increases magnetic flux (ΦB = ∫ B ⋅ dA = BA). The induced field opposes this. Using RHR #2, the current flows CCW.