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lenzs law
This law was stated by Heinrich Friedrich Lenz (1804-1865). The law is stated as: The polarity of induced e.m.f is such that it tends to produce a current which opposes the change in magnetic flux that produces it.
According to Farady's law, whenever the flux linking with the coil changes, emf will induce in that coil.Actually the material should oppose the flux changes, that opposition is the induced current. Induced current will set own flux, opposite to that of the flux changes.For further details, refer lenz law.
Normally emf can be calculated by the following formula e=N*(dф/dt) where dф/dt = rate of change of flux linkages In actual practice it is given as e=-[N*(dф/dt) ] because as per lenzs law the voltage induced in a direction to oppose the very cause for it i.e., change in flux linkages. vydehi
It's an increasing current, not voltage, that induces an e.m.f. into a coil. The reason that the induced e.m.f. opposes the increasing current is all to do with the Law of the Conservation of Energy.
lenzs law
LENZ LAW gives the direction of induced current.
There is no such thing as an 'induced current'. What is 'induced' is a voltage. If the conductor into which that voltage is induced forms a complete circuit, then a current will result. But it's the voltage that's induced, NOT the current! The direction of the induced voltage is explained by Lenz's Law which, in simple terms, tells us that the direction of the inducted voltage is always such that it will oppose the change in current that causes it. So the induced voltage will oppose any increase in current, but will act in the same direction as a reduction in current.
The direction of an induced emf or current is such that the magnetic field created by the induced current opposes the change in magnetic flux that created the current.
The direction of an induced emf or current is such that the magnetic field created by the induced current opposes the change in magnetic flux that created the current.
Lenz's law and Faraday's law of Induction.The induced current causes a magnetic field according to Ampere's law, which itself has a flux through the closed loop. According to Lenz's law, the direction of the induced current and which results in the induced magnetic flux opposes the initial magnetic flux.
This law was stated by Heinrich Friedrich Lenz (1804-1865). The law is stated as: The polarity of induced e.m.f is such that it tends to produce a current which opposes the change in magnetic flux that produces it.
Lenz's law states that 'for a current induced in a conductor by a changing magnetic field, the current is in such a direction that its own magnetic field opposes the change that produced it.'
Electric current will be induced in such a way that the flux of the magnetic field will be constant and thereby the induced current will create magnetic field in the same direction. This is what we call Lenz's law(law of conservation of energy).
Lenz's Law
a current can be induced by changing the area of a coil in a constant magnetic field. By Faraday's Law: the induced current is proportional to the rate of the change of flux in a loop of wire. With magnetic flux being defined as the product of the magnitude of the magnetic field and the area of the loop. The direction of the current is found from Len's Law: The induced current produces an induced magnetic field that opposes the change of flux causing the current.CommentYou don't induce a current, you induce a voltage. And Faraday's Law states that the induced voltage, not current, is proportional to the rate of change of flux! If the coil is open circuited, a voltage is still induced into the coil but no current will flow. For current to flow, the coil must be connected to a load (or short circuited), and this current is dependent upon the values of the induced voltage and the resistance of the load.
IF by Lentz law, you mean Lenz's law it is the law that for current to be induced through a wire with a magnetic field work must be done to push the magnet into the field and to pull it out of the field. "An induced current is always in such a direction as to oppose the motion or change causing it" (http://en.wikipedia.org/wiki/Lenz%27s_law)