All Flashcards
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.
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 is the effect of increasing the number of loops in the secondary coil of a transformer?
The output voltage increases (voltage step-up).
What is the effect of moving a magnet towards a conducting loop?
A current is induced in the loop, creating a magnetic field that opposes the motion of the magnet.
What happens when a conducting rod moves through a magnetic field?
A motional EMF is induced in the rod, given by .
What is the effect of increasing the velocity of a conducting rod moving through a magnetic field?
The induced EMF increases, leading to a larger induced current if the circuit is closed.
What is the effect of increasing the magnetic field strength on a moving conductor?
The induced EMF increases, leading to a larger induced current and force.