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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;
Mach number is the ratio of velocity of source to the velocity of sound. Mach Number = Velocity of Source / Velocity of Sound .
A monochromatic beam of unpolarised light is incident on a glass slab. The reflected ray is found to be purely plane polarized. Evaluate the angle between the reflected and the ref
Three capacitors of capacitance 6µF each are available. Determine the minimum and maximum capacitances that could be acquired.
It is the opposition offered by the material of the flux. Reluctance α mean length of flux path and reluctance α 1/cross section A Reluctance=1/μ 0 μ r A Here μ 0 a
The parachute on a race car that weighs 8750 N opens at the end of a quarter-mile run when the car is traveling 38 m/s. What net retarding force (magnitude) must be supplied by the
It is described by de-Broglie a moving material molecule sometimes acts as a wave and sometimes as a particle. The wave associated with moving particle is known as matter w
Mass energy relation - The total energy of a body is the sum of its kinetic energy and rest mass energy. Particle having rest mass zero always move with the velocity of light.
Charging a capacitor: In the diagram below, all of the resistance in the circuit is added together and shown as a single value R. With S 1 closed and S 2 open, the ca
What is double refraction? Differentiate between ordinary and extra ordinary ray.
what are solid core fibres?
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