Electromagnetic Induction
Learning Objectives
- Students will be able to explain Faraday's law of electromagnetic induction
- Students will be able to apply Lenz's law to predict induced currents
- Students will be able to calculate induced EMF in changing magnetic fields
Core Concepts
- Faraday's Law
- Lenz's Law
- Induced EMF
Formulas
$$\varepsilon = -N\frac{\Delta\Phi}{\Delta t}$$
Faraday's Law: induced EMF equals rate of change of magnetic flux
$$\Phi = BA\cos\theta$$
Magnetic flux through a surface
Units
| Weber | Wb |
Interesting Fact
The induced EMF is proportional to the rate of change of magnetic flux, not the flux itself
Key Scientist
Michael Faraday
Discovered electromagnetic induction and formulated Faraday's Law
Modern Research
Wireless power transfer and inductive charging technologies utilize Faraday's law to transmit energy across space without physical contact.
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