Question

The magnitude of induced e.m.f. is maximum, when the plane of the armature of a.c. dynamo is:

Answer 1

The generation of an electromotive force across an electrical conductor in a changing magnetic field is known as electromagnetic or magnetic induction. Induction was discovered in 1831 by Michael Faraday, and it was mathematically defined as Faraday's law of induction by James Clerk Maxwell. The direction of the induced field is described by Lenz's law.

Complete answer:
Faraday's law was eventually extended to become the Maxwell–Faraday equation, one of Maxwell's four electromagnetic equations. Electrical components like inductors and transformers, as well as devices like electric motors and generators, have all benefited from electromagnetic induction.
Induced emf, also known as induced electromotive force, electromagnetic induction, and electromotive force induction, is a kind of electromagnetic induction. It's the development of a potential difference in a coil as a result of changes in the magnetic flux passing through it. When the flux connecting with a conductor or coil changes, electromotive Force, or EMF, is said to be induced.
Electromotive forces can be generated in two methods.
The first method involves placing an electric conductor in a moving magnetic field.
The second method is inserting a continually moving electrical wire into a magnetic field that is static in nature.
The rate of change of magnetic flux associated with the armature is greatest when the plane of the armature is parallel to the lines of force of the magnetic field. As a result, the e.m.f. generated in the armature is greatest in this direction.

Note: Eddy currents are circular currents produced by induction in electrical conductors travelling through a constant magnetic field or stationary conductors within a changing magnetic field. In planes perpendicular to the magnetic field, eddy currents flow in closed loops. Eddy current brakes and induction heating systems are two examples of where they can be used. Eddy currents produced in the metal magnetic cores of transformers, AC motors, and generators, on the other hand, are undesirable because they lose energy (known as core losses) as heat in the metal resistance.