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ROTOR:
(i) squirrel -cage rotor
(ii) phase-wound or wound-rotor
90% of Induction Motor are squirrel cage type due to this type of rotor has a easiest and the most rugged construction and is almost indestructible. Rotor having of a cylindrical laminated core with parallel slots for carrying rotor conductors. Rotor bars are enduringly short circuited on themselves;
Can you give the condition for dispersion without deviation and illustrate colour has got the maximum angle of deviation?
Q. State Brewster's law. Brewster's law the digression of the polarising angle is numerically equal to the refractive index of the medium. That is tan ip = μ
Working Principle of D.C Motor A) An electric motor is a machine which changes electrical energy into mechanical energy. B) When a current carrying conductor is placed in a
is average speed the magnitude of average velocity?justify your answer with a suitable example?
Q. An aircraft having awing span of 10 m flies at a speed of 720 kmph. If the vertical component of the earth's magnetic field is 3 X 10 -5 T, calculate the emf induced between th
Semi conductors: Semi conductors are these substances which lie among conductor and insulators. Semi conductor is those substances which hardly pass electric current by them
(a) Two55 g ice cubes are dropped into300 g of water in a thermally insulated container. If the water was initially at 25°C, and the ice came directly from a freezer at -15°C, what
Q. An object of size 3.0 cm is placed 14cm in front of a concave lens of focal length 21 cm. Describe the image produced by the lens. What happens if the object is moved further aw
Poisson equation (S.D. Poisson) It is the differential form of Gauss' law, such as, div E = rho,
calour formed in pure and impure spectrum
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