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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
How is Specific Gravity defined? Specific Gravity, SG, is a unit less quantity that provides the scientist or engineers an idea of how dense a substance is compared to water. T
Event horizon: The radius which a spherical mass has to be compressed to transform it in a black hole, or the radius at which space and time switch responsibilities. Once insi
At 400.0 K, germanium has 1.13 x 10 15 free electrons/cm 3 . How many free electrons per Ge atom are there at this temperature? At 400.0 K, silicon has 4.54 x 10 12 free
a car with an initial speed of 24.5 km/hr accelerates at a uniform rate of 0.98 m/s^2 for 5.6sec. find the final speed and displacement of the car during this time.
A 6kg crate originally at rest is pulled to the right along a horizontal plane with a constant horizontal force of 12N. a)find the velocity of the crate once it has moved 3m on th
Elasticity is defined as the ability of a solid to return to its original shape even after being expanded or contracted. Elasticity is termed as the property of a solid to return t
their applications,operations and characteristics?
Explain about Atoms Atoms - having of a nucleus (central core) and orbiting electrons. Nucleus have protons (+ particles) and neutrons (neutral particles). Neutral atoms have
how can sensitivity curve b measured?
Explain Crohn disease Crohn's disease: a chronic, recurrent disease characterized by patchy inflammation of any portion of digestive tract from the mouth to anus.
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