Creating Current with Magnetism
Learning Objective
I can describe how a changing magnetic field can produce an electric current.
Key Concepts
According to Faraday's Law of Induction, a changing magnetic field will induce an electromotive force (EMF) in a loop of wire.
Magnetic flux is a measure of the magnetic field running through a loop of wire, and the induced EMF is equal to the negative of the change in flux over the change in time.
Lenz's Law states that the magnetic field generated by the induced current will be in the opposite direction of the change in magnetic flux.
Practice Questions
This lesson includes 12 practice questions to reinforce learning.
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1. According to Faraday's Law of Induction, what condition is necessary for a magnetic field to induce an electric current in a loop of wire?
2. Define magnetic flux and explain its significance in electromagnetic induction.
3. List three factors that affect the magnetic flux through a loop of wire.
...and 9 more questions
Educational Video
Induction - An Introduction: Crash Course Physics #34
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