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Dc machine consists of the following parts:
Field system: The object of the field system is to make a uniform magnetic field, within which the armature rotates. It having of four parts- yoke, pole core, pole shoe and field -coils.
Armature core: It houses the armature conductors or coils and causes them to rotate and as cuts the magnetic flux of field magnets
Commutator: The commutator is a type of rotating switch placed among the armature and external circuit and so arranged that it will reverse the link with the external circuit at the instant of every reversal of current in the armature.
Brushes and Brush gears: The function of brushes is to collect current from the commutator and supply it to the external load circuit. The brushes might be of carbon, graphite, copper, metal graphite, carbon graphite
the sun warming the earth is an example of?
Example of state function
two students walk in the same direction along a straight path at a constant speed one at .90m/s and another at 1.90m/s. assuming that they start at the same point and same time, ho
Steelyards Either Roman or Danish steelyards can be improvised using short lengths of lead or iron water pipe as counter-weights and loops of wire s pivots. The rod can be o
Describe how the laser transitions are arisen. The given energy level diagram could describe how the laser transitions arise. Collisions in between the He atoms and Ne
(i) The procedure of ejection of electrons from a metal surface by the application of heat is known as thermionic emission and emitted electrons are known as thermions and current
experimental values
An object of mass 4 kg is moving on a smooth horizontal surface with a velocity of 10 m/s in rightward direction. A horizontal force F which shows in the above figure was applied o
what is the difference between a supplementary unit and fundamental unit
A steel ring of mean diameter 120mm is uniformly woundwith 1500 turns of wire. When a current of 0.30A is passed by the coil a flux density of 1.5 T is set up in the steel.
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