Faraday’s law of electromagnetic induction
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GC: n

CT: In 1831, Michael Faraday, an English physicist gave one of the most basic laws of electromagnetism called Faraday’s law of electromagnetic induction. This law explains the working principle of most of the electrical motors, generators, electrical transformers and inductors. This law shows the relationship between electric circuit and magnetic field. Faraday performs an experiment with a magnet and coil. During this experiment, he found how emf is induced in the coil when flux linked with it changes. He has also done experiments in electro-chemistry and electrolysis.

S: http://www.electrical4u.com/faraday-law-of-electromagnetic-induction/ (last access: 4 December 2016)

N: 1. Faraday’s law is an eponymous based on the family name of the English scientist Michael Faraday (1791-1867).
2. Faraday’s law is a fundamental relationship which comes from Maxwell’s equations. It serves as a succinct summary of the ways a voltage (or emf) may be generated by a changing magnetic environment. The induced emf in a coil is equal to the negative of the rate of change of magnetic flux times the number of turns in the coil. It involves the interaction of charge with magnetic field.
3. Faraday law is one of the most basic and important laws of electromagnetism. This law finds its application in most of the electrical machines, industries and medical field etc.
4. Faraday’s Law has two laws:
– Faraday’s First Law:

  • Whenever a conductor is placed in a varying magnetic field an EMF gets induced across the conductor (called as induced emf), and if the conductor is a closed circuit then induced current flows through it.
  • Magnetic field can be varied by various methods: 1. By moving magnet. 2. By moving the coil. 3. By rotating the coil relative to magnetic field.

– Faraday’s Second Law:

  • Faraday’s second law of electromagnetic induction states that, the magnitude of induced emf is equal to the rate of change of flux linkages with the coil. The flux linkages is the product of number of turns and the flux associated with the coil.

5. Faraday’s law was later incorporated into the more comprehensive Maxwell’s equations, according to Michael Dubson, a professor of physics at the University of Colorado Boulder. Maxwell’s equations were developed by Scottish physicist James Clerk Maxwell to explain the relationship between electricity and magnetism, essentially uniting them into a single electromagnet force and describing electromagnetic wavesthat make up radio waves, visible light, and X-rays.
6. Physics and Magnetism: The fundamental law of electromagnetic induction which states that the e.m.f. induced in a closed circuit is proportional to the rate of change of the flux linked by the circuit.
The sign is given by Lenz’s law.

S: 1. FS – http://www.famousscientists.org/michael-faraday/ (last access: 2 December 2016). 2. Hyperphysics – http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html (last access: 2 December 2016). 3. E4U – http://www.electrical4u.com/faraday-law-of-electromagnetic-induction/ (last Access: 2 December 2016). 4. EE – http://www.electricaleasy.com/2014/02/faradays-law-and-lenzs-law-of.html (last access: 2 December 2016). 5. LS – http://www.livescience.com/53509-faradays-law-induction.html (last access: 2 December 2016). 6. GDT – http://www.granddictionnaire.com/ficheOqlf.aspx?Id_Fiche=4499674 (last access: 4 December 2016).

SYN: 1. Faraday’s law of induction. 2. law of electromagnetic induction, Faraday’s law.

S: 1. MIT – http://web.mit.edu/viz/EM/visualizations/coursenotes/modules/guide10.pdf (last access: 2 December 2016); LS – http://www.livescience.com/53509-faradays-law-induction.html (last access: 2 December 2016). 2. TERMIUM PLUS – http://goo.gl/V8Qa81 (last access: 4 December 2016).

CR: electric current, electricity, electrolysis, electromagnetic wave.