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Consider a three-phase induction motor with a normal torque-speed characteristic. Neglecting the effects of stator resistance and leakage reactance, discuss the approximate effect on the characteristic, if:
(a) The applied voltage and frequency are halved.
(b) Only the applied voltage is halved, but the frequency is at its normal value.
Voltage and Frequency Control Methods In this control method the ratio of voltage to frequency is kept constant so that the flux remains constant. The voltage at varia
Q. Illustrate the principles of operation of centralized SPC and distributed SPC and compare their performance. Ans: In centralized control, all control equipment is replac
Q. Show a block diagram of a 4-bit, parallel-input shift-right register and briefly explain its operation.
A universal shift register can shift in both the left-to-right and right-to-left directions, and it has parallel-load capability. Draw a circuit for such a shift register.
What is meant by doping? Doping: Semiconductors in its extremely pure form are termed as intrinsic semiconductor such intrinsic semiconductor to which several suitable impur
Tick off the material, which is different from the group (A) Constantan. (B) Manganin. (C) Nichrome. (D) Brass. Ans: Tick off the materi
Two three-phase, 6.6-kV, wye-connected synchronous generators, operating in parallel, supply a load of 3000 kWat 0.8 power factor lagging. The synchronous impedance per phase ofmac
What do you understand by solid modeling and wireframe modeling in CAD systems? Explain and compare the both modellings. Describe the following 1. Boundary representation 2.
Design a 4-bit synchronous counter that has the following sequence: 0 ?4? 9?12 ? 14 ?15 and repeat using: i) JK FF ii)D FF
Q. Consider an RL series circuit excited by (a) v(t) = 20e -2t V, and (b) v(t) = 20 V. Determine the forced component of the voltage across the inductor for R = 2 and L = 2H.
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