2.4.3 Electromagnetic Induction

Cards (15)

Electromagnetic induction requires a stationary magnetic field.
False
Increasing the number of turns in a coil increases the induced voltage. 
True
Electromagnetic induction requires a changing magnetic field
Lenz's Law states that the induced current opposes the change in the magnetic field
In a transformer, the changing magnetic field in the primary coil induces a voltage in the secondary
What is electromagnetic induction?
Producing voltage in a conductor
What are the two conditions necessary for electromagnetic induction?
Changing magnetic field and conductor
What is the formula for Faraday's Law of Electromagnetic Induction?
$V =$ $- N \frac{\Delta \Phi}{\Delta t}$
A stationary conductor within a changing magnetic field will induce a voltage.
False
Lenz's Law is based on the principle of conservation of energy. 
True
The magnitude of the induced voltage depends on the rate of change of the magnetic field
Faraday's Law states that the induced voltage is directly proportional to the rate of change of magnetic flux
What is the unit of magnetic flux?
Weber
According to Faraday's Law, what happens to the induced voltage if the rate of change of magnetic flux increases?
Increases proportionally
What is one example of a device that uses electromagnetic induction to generate electrical energy?
Generator