![]() The current induced in the coil creates another field, in the opposite direction of the bar magnet’s to oppose the increase. Lenz’ Law: (a) When this bar magnet is thrust into the coil, the strength of the magnetic field increases in the coil. What is the flux through the sphere Heres the key thing you have to. Faraday was aware of the direction, but Lenz stated it, so he is credited for its discovery. Easy example 2: You have a point charge q at the center of a perfect sphere of radius R. ![]() The direction (given by the minus sign) of the EMF is so important that it is called Lenz’ law after the Russian Heinrich Lenz (1804–1865), who, like Faraday and Henry, independently investigated aspects of induction. ![]() Although flux is a general term and not limited to electromagnetics. Electric flux formula is obtained by multiplying the electric field and the component of the area perpendicular to the field. It is closely associated with Gauss’s law and electric lines of force or electric field lines. It is a quantity that contributes towards analysing the situation better in electrostatic. The electric field at a point is related to the electric potential at that same point through the equation: EdrdVeleci.e.ExxVelec, EyyVelec. The minus means that the EMF creates a current I and magnetic field B that oppose the change in flux Δthis is known as Lenz’ law. The measure of flow of electricity through a given area is referred to as electric flux. The area that the electric field lines penetrate is the surface area of the sphere of. The mathematical relation between electric flux and enclosed charge is known as Gauss’s law for the electric field, one of the fundamental laws of electromagnetism. The minus sign in Faraday’s law of induction is very important. Electric Flux: Example What is the electric flux through a sphere that has a radius of 1.00 m and carries a charge of +1.00 C at its centre Solution: The electric flux is required () EEAA 55 EE 8.99 x 10 99x 1 x 10-66/ 12 EE 8.99 x 10 33N/C. The units for EMF are volts, as is usual. This relationship is known as Faraday’s law of induction.
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