Difference between revisions of "Faraday's Law"
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*The [[Electromagnetic Induction|induced]] [[Electromotive Force|emf]] opposes the change in [[Magnetic Flux|magnetic flux]]. | *The [[Electromagnetic Induction|induced]] [[Electromotive Force|emf]] opposes the change in [[Magnetic Flux|magnetic flux]]. | ||
*[[Magnetic Flux Linkage|Magnetic flux linkage]] is defined as the product of the number of turns in the coil and the [[Magnetic Flux|magnetic flux]] through the coil. | *[[Magnetic Flux Linkage|Magnetic flux linkage]] is defined as the product of the number of turns in the coil and the [[Magnetic Flux|magnetic flux]] through the coil. | ||
| − | *'''Faraday's Law''' is fundamental in the operation of [[generator]]s, [[transformer]]s, and various electromagnetic devices. | + | *'''Faraday's Law''' is fundamental in the operation of [[generator]]s, [[Electrical Transformer|transformer]]s, and various electromagnetic devices. |
===Formulae=== | ===Formulae=== | ||
Revision as of 10:18, 30 May 2024
Contents
Key Stage 5
Meaning
Faraday's law of electromagnetic induction states that the induced emf in a circuit is equal to the rate of change of magnetic flux linkage through the circuit.
About Faraday's Law of Electromagnetic Induction
- The induced emf opposes the change in magnetic flux.
- Magnetic flux linkage is defined as the product of the number of turns in the coil and the magnetic flux through the coil.
- Faraday's Law is fundamental in the operation of generators, transformers, and various electromagnetic devices.
Formulae
Faraday's Law is stated mathematically as:
- \(\varepsilon=-\frac{\Delta\Phi}{\Delta t}\)
Where,
- \(\varepsilon\) is the electromotive force
- Φ is the magnetic flux
- t is the time.
The negative sign in the equation represents Lenz's Law, indicating that the induced emf opposes the change in magnetic flux.
Additionally Φ is given by:
- Φ=𝐵𝐴cos𝜃
Where:
- 𝐵 is the magnetic field strength
- 𝐴 is the area of the coil
- 𝜃 is the angle between the field and the normal of the area