All Flashcards
What is the effect of increasing the number of loops in a coil on the induced EMF?
The induced EMF increases proportionally (ε = -N (dΦB/dt)).
What happens when a magnet is moved towards a conducting loop?
The magnetic flux through the loop changes, inducing an EMF and a current that opposes the change in flux (Lenz's Law).
What is the effect of increasing the velocity of a metal bar moving through a magnetic field on the induced EMF?
The induced EMF increases proportionally (ε = Blv).
Label the parts of a transformer.
1: Primary Coil, 2: Secondary Coil, 3: Core
Label the components in a motional EMF setup.
1: Magnetic Field (B), 2: Moving bar with velocity (v), 3: Length of the bar (l)
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.