FIRST LAW. First Law of Faraday's Electromagnetic Induction state that whenever a conductor are placed in a varying magnetic field emf are induced which is called induced emf, if the conductor circuit are closed current are also induced which is called induced current.
Faraday's Law of Electromagnetic Induction :
A change in the magnetic environment of the coil or conductor will cause a voltage(emf) induce in the coil. Faraday law is the fundamental relationship which comes from the Maxwell’s equation.
◇ Faraday's First Law : A conductor is induced with an electromotive force when the surrounding magnetic field changes.
◇ Faraday's 2nd Law : The rate of change of field is directly proportional to the magnitude of the electromotive force.
◇ Faraday's 3rd Law : The sense of the induced electromotive force depends on the direction of the rate of the change of the field.
E= – ndǿ/ dt.
In this the induced emf (e) and the change in magnetic flux (d) have opposite signs.
Faraday's law of induction (briefly, Faraday's law) is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)—a phenomenon called electromagnetic induction. It is the fundamental operating principle of transformers, inductors, and many types of electrical motors, generators and solenoids.
The Maxwell–Faraday equation (listed as one of Maxwell's equations) describes the fact that a spatially varying (and also possibly time-varying, depending on how a magnetic field varies in time) electric field always accompanies a time-varying magnetic field, while Faraday's law states that there is EMF (electromotive force, defined as electromagnetic work done on a unit charge when it has traveled one round of a conductive loop) on the conductive loop when the magnetic flux through the surface enclosed by the loop varies in time.
Faraday's law had been discovered and one aspect of it (transformer EMF) was formulated as the Maxwell–Faraday equation later. The equation of Faraday's law can be derived by the Maxwell–Faraday equation (describing transformer EMF) and the Lorentz force (describing motional EMF). The integral form of the Maxwell–Faraday equation describes only the transformer EMF, while the equation of Faraday's law describes both the transformer EMF and the motional EMF.
First Law of Faraday's Electromagnetic Induction state that whenever a conductor are placed in a varying magnetic field emf are inducedwhich is called induced emf, if the conductor circuit are closed current are also induced which is calledinduced current.
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.
If we keep an electric conductor in a magnetic such that direction of the of the current flowing through the conductor is perpendicular to the magnetic field then a force is exerted on the conductor because of the conductor move in the year 1831 Michael Faraday s h o w e d that an electric current can be produced in a conductor with the help of a moving magnet
FARADAY'S LAW OF MAGNETIC INDUCTION :-
• When the magnet is stationery and kept outside the coil , the needle of the galvanometer does not deflect and the reading of the galvanometer is zero
• when the magnet moved towards the coil, the galvanometer needle shows deflection . This shows the presence of current in the coil.
• When the magnet is completely inside the coil but not moving the galvanometer reading again come to zero . This shows the absence of flow of electric current in the coil
• when the magnet is being moved away from the coil, the galvanometer needle again shows deflection but in opposite direction .
Hope it helps
hope you understand
please like and comment