Electromagnetic Induction. emf is induced in a conductor placed in a magnetic field whenever there is a change in magnetic field. Moving Conductor in a Magnetic Field. http://www.ngsir.netfirms.com/englishhtm/Induction.htm.
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E = Blv.
E = E It = W
The ‘-’ sign indicates that the induced e.m.f. acts to
oppose the change.
0Variation of current with the steady angular speed of the coil in a motor
0Variation of output power with the steady angular speed of the coil in a motor
Thick copper wire
Closed loop laminated iron core
The magnetic flux linkage in a coil the current flowing through the coil.
Where L is the constant of proportionality for the coil.
L is numerically equal to the flux linkage of a circuit when unit current flows through it.
Unit : Wb A-1 or H (henry)
Lis numerically equal to the emf induced in the circuit
when the current changes at the rate of 1 A in each second.