NRJC: /* Formulae */

2024-05-28T10:18:05Z

‎Formulae

NRJC: Created page with "==Key Stage 5== ===Meaning=== '''Electromagnetic induction''' is the generation of an electromotive force (emf) in a conductor..."

2024-05-28T10:17:53Z

Created page with "==Key Stage 5== ===Meaning=== '''Electromagnetic induction''' is the generation of an electromotive force (emf) in a conductor..."

New page

==Key Stage 5==
===Meaning===
'''Electromagnetic induction''' is the generation of an [[Electromotive Force|electromotive force]] (emf) in a [[Electrical Conductor|conductor]] due to a change in [[Magnetic Flux|magnetic flux]].

===About Electromagnetic Induction===
*There are two physical laws governing '''electromagnetic induction'''.
**[[Faraday's Law]] states that the [[Electromotive Force|emf]] produced as a [[Electrical Conductor|conductor]] experiences a changing [[Magnetic Field|magnetic field]] is [[Proportional|proportional]] to the rate of change of that [[Magnetic Field|magnetic field]] with respect to time.
**[[Lenz's Law]] states that the direction of the [[Electromagnetic Induction|induced]] emf is such that it opposes the change in flux that produced it (which is represented by a negative sign in the formula).
*'''Induced emf''' can be increased by increasing the rate of change of the [[Magnetic Flux|magnetic flux]], the number of turns in the coil, or the strength of the [[Magnetic Field|magnetic field|magnetic field]].
*'''Electromagnetic Induction''' is a key principle in the operation of [[transformer]]s, electric [[generator]]s, and inductors.

===Formulae===
'''Electromagnetic Induction''' is described by Faraday's Law:
*<math>\varepsilon=-\frac{\Delta\Phi}{\Deltat}</math>
Where,
*<math>\varepsilon</math> is the [[Electromotive Force|electromotive force]]
*Φ is the magnetic flux
*t is the time.

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

@@ Line 12: / Line 12: @@
 ===Formulae===
 '''Electromagnetic Induction''' is described by Faraday's Law:
-*<math>\varepsilon=-\frac{\Delta\Phi}{\Deltat}</math>
+*<math>\varepsilon=-\frac{\Delta\Phi}{\Delta t}</math>
 Where,
 *<math>\varepsilon</math> is the [[Electromotive Force|electromotive force]]

Electromagnetic Induction - Revision history

NRJC: /* Formulae */

NRJC: Created page with "==Key Stage 5== ===Meaning=== '''Electromagnetic induction''' is the generation of an electromotive force (emf) in a conductor..."