Page 71 - Basic Electrical Engineering

or,

Inductance is the property of a coil capable of inducing emf in itself due to

changing current through it.

The formulae so far derived are

1. Force on a current-carrying conductor in a magnetic field

F = BIℓ Newtons.

If the conductor is inclined at an angle θ with the magnetic field,

F = BIℓ Sinθ Newtons.

2. Induced EMF in a coil where there is change of flux linkage or change in current,

3. Induced EMF in a conductor rotating in a magnetic field,

e = Pϕn V

where P is the number of poles, ϕ is the flux per pole and n is the revolutions per second.
4. Induced EMF in a conductor moving in a magnetic field in a perpendicular direction,

e = Bℓv V

2
where B is the flux density in Wb/m , ℓ is the length of the conductor in m and v is the
velocity in m/sec. If the conductor is moving at an angle of θ with the magnetic field, the
induced EMF is

e = Bℓv Sinθ V.

5. Induced EMF in a coil,