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Armature core:
It houses the armature conductors or coils and causes them to rotate and as cuts the magnetic flux of field magnets. It also gives a path of very low reluctance to the flux by the armature from north to South Pole. It is cylindrical or drum shaped and is built of circular sheet steel discs or laminations.
Q. Why nichrome is used as heating element in electric heating devices? Nichrome, an alloy of nickel as well as chromium is used as the heating element for the following reaso
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 3excited state. The atom returns to the ground state by emitting two photons. What are
What you mean by term quantum mechanics? The term “quantum” came from the Latin word that implies "how great" or "how much" that is quantity. In quantum mechanics, that refers
project work
What are ultrasonic drilling and cutting? Explain in short. Ultrasonic Drilling and Cutting Ultrasonic are utilized for making holes into very hard materials as like glass a
Henry; H (after W. Henry, 1775-1836): The derived SI unit of inductance, described as the inductance of a closed circuit wherein an electromotive force of 1 V is generated whe
ELASTIC COLLISION: "The collision in which both linear momentum and K.E are conserved is said to be elastic collision". OR "In the ideal case when no K
Q. Give three applications of photoelectric cells. (i) Photoelectric cells are utilized for reproducing sound in cinematography. (ii) They are utilized for controlling the
A string has a linear density of 7.20 10-3 kg/m and is under a tension of 390 N. The string is 1.9 m long, is fixed at both ends, and is vibrating in the standing wave pattern sho
Eotvos law of capillarity (Baron L. von Eotvos; c. 1870): The surface tension gamma of liquid is associated to its temperature T, the liquid's critical temperature, T*, & its
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