10 Questions
What principle do all generators work on?
Faraday's law of electromagnetic induction
What determines the magnitude of the induced e.m.f in a conductor?
Rate of change of flux associated with the conductor
What is the relative motion required to induce an e.m.f in a conductor?
Rotating conductor with respect to flux or rotating flux with respect to a conductor
What is the winding formed by connecting a number of conductors together called?
Armature winding
What part of a D.C. machine is the armature winding kept on?
Armature
What is the function of the yoke in a DC machine?
To protect insulating materials from atmospheric elements
Why is cast iron chosen for making the yoke in a DC machine?
It is the cheapest material available
What is the function of the pole shoe in a DC machine?
To enlarge the area of armature core to come across the flux
Why is a laminated construction used for making the poles in a DC machine?
It requires a definite shape and size
What is the role of the field winding in a DC machine?
To produce the magnetic flux
Explore the principle of dynamically induced e.m.f in D.C. machines and how generators work based on Faraday's law of electromagnetic induction. Learn about the magnitude of the induced e.m.f in a conductor.
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