Physics - Faraday's Law of Electro - Magnetic Introduction

Faraday's Law of Electro - Magnetic Introduction

The induced e. m. f is directly proportional the rate of change of magnetic flux that is

$e\propto \frac {d\phi } {dt}$

Where $\phi$ is the flux linkage for one turn.

If the coil contains N turns an e. m. f appears in every turn and all these e. m. f's to be added.

If the coil has N turrns then,

$e\propto \frac {d\phi } {dt}$

$e\, =\, -k\frac {d(N\phi )} {dt}\, \, \, here\, k\, =1$

$e\, =\, -\frac {d(N\phi )} {dt}\, \, \, [Where\, N\phi \, is\, total\, linkage\, in\, the\, coil\, of\, N\, turns]$

$e\, =\, -N\frac {d\phi } {dt}\, \, \, but\, \phi \, =\, BA\, where\, B\, =\, Magnetic\, Indu..\, ,\, A\, =\, area$

$e\, =\, -\frac {d} {dt}(NBA)$

Negative Sign indicates that the induced emf opposes any change according to Lenz's law .

It is also called as Neumann's las

Post By : Ashish Maurya 17 May, 2020 169 views Physics