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Functions of the commutator:
A commutator is a device, which under certain conditions changes ac into dc and vice versa.
The commutator is a form of rotating switch placed between the armature and external circuit and so arranged that it reverses the links to the external circuits at the instant of every reversal of the current in the armature coil. Thus it changes induced alternating currents in armature coils into direct currents in the external load circuits.
Get a mathematical expression for the torque on a loop placed in a uniform magnetic filed. Define the working and construction of moving coil galvanometer?
Some experiments with soap films Make the following forms from wire. Dip the several forms in the thick soap solution and view the films. Dip the wire form with the slider i
conclution about friction is a necessary evil
Ask question how many types of couple are there?#Minimum 100 words accepted#
Differentiate between displacement current and conduction current.
Three similar coils, each having a resistance of 8 and an inductive reactance of 8 are connected (a) in star and (b) in delta, across a 415V, 3-phase supply. Measure for
Motion of an object in a plane is called two dimensional (2-D) motions. For 2-D motion acceleration or velocity can be explained by two elements in any two mutually perpendicular d
Explain why a narrow slit is used in case of Bi-prism experiment where as an extended source is used in Newton's rings experiment?
MANUFACTURING: R esistive element is prepared in carbon composition, but the filler used is ceramic powder. The sheet resistance is controlled by changing the quantity of carb
Why does a glass filled with water shatter when you run your finger along the rim of the glass? A piece of crystal stemware has a natural or resonant frequency that can be exc
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