The maximum emf produced by the AC generator is the peak voltage of the generator. It will be 250 V.

The source of energy generation is the mechanical energy of rotation of armature coil.

The induced emf in a coil in AC generator is given as:

1. E=NABωsinθ
2. ω=dθ/dt. Now, when the angle between the normal of plane and magnetic field is zero degrees, the induced emf is zero i.e.
3. E=NABωsin0=0.

By Faraday’s law, the magnitude of the induced emf is equal to the rate of change of magnetic flux, so its maximum values occurs when the flux curve has its greatest slope. The induced emf goes through zero when the flux curve has zero slope. We observe a 90o phase shift between flux and induced emf.

We use Faraday’s law of induction to find the average emf induced over a time Δt: emf=−NΔΦΔt emf = − N Δ Φ Δ t . We know that N = 200 and Δt = 15.0 ms, and so we must determine the change in flux ΔΦ to find emf.

DYNAMICALLY INDUCED EMF Thus by following either of the two process the conductor cuts across the magnetic field and the emf is induced in the coil. This phenomenon takes place in electric generators and back emf of motors and also in transformers.

The magnitude of Δo depends on three factors: the valence of the metal, the principal quantum number of the metal (and thus its location in the periodic table), and the nature of the ligand(s). Values of Δo for some representative transition-metal complexes are given in Table 5.6. 4.

It can be defined as the generation of a potential difference in a coil due to the changes in the magnetic flux through it. In simpler words, electromotive Force or EMF is said to be induced when the flux linking with a conductor or coil changes.

the current produced due to induction of coil is induced current… the electromotive force which can be produced due to action of induced current in the coil…is induced emf.. The current is a result of an emf induced by a changing magnetic field, whether or not there is a path for current to flow.

By Faraday’s Law, you get an induced emf whenever there’s a changing magnetic flux through a loop. If the changing emf is due to some kind motion of a conductor in a magnetic field, you would call it a “motional emf”.

Induced emf is also called back emf because, the induced emf opposes the change in current, due to the source of emf.

If a coil of wire is placed in a changing magnetic field, a current will be induced in the wire. This current flows because something is producing an electric field that forces the charges around the wire. This “something” is called an electromotive force, or emf, even though it is not a force.

GENERATOR PRINCIPLE: Whenever a conductor cuts magnetic lines of force EMF is induced. MOTOR PRINCIPLE: When a current carrying conductor is placed in a magnetic field, the conductor experiences a force and the rotor starts rotating. There is no back emf in a generator.