A four-pole, star-connected, squirrel-cage induction motor operates from a variable voltage 50 Hz three-phase supply. The following results were obtained as the supply voltage was gradually reduced with the motor running ...
|
Question - (i) A star-connected, three-phase synchronous induction motor takes a current of 10 amps from a 415 volt supply at unity power factor when supplying a steady load. If the synchronous reactance is 5 ohms/phase ...
|
Nanotechnology Engineering - Resonance Circuits Questions - Q1) A series RLC network has R = 2KΩ, L = 40mH and C = 1μF. Calculate the impedance at resonance and at one-fourth, one-half, twice, and four times the resonant ...
|
Question 1: In the voltage regulator circuit in Figure P2.21, V 1 = 20 V, V Z = 10 V, R i = 222Ω and P z (max) = 400 mW. (a) Determine I L, I z , and I L , if R L = 380Ω. (b) Determine the value of R L , that will establ ...
|
Question 1 For the CE amplifier in Figure (1), given the following component parameters: Parameter Value β DC , β AC 150 V BE 0 . 7 V V CC 12 V R C 820 ? R E 1 100 ? R E 2 220 ? R 1 20 k? R 2 5 . 2 k? R L 100 k? C 1 , C ...
|
Questions - Problem 1 - Given the sinuosidal voltage v(t) = 50 cos(30t+10 o ) V, find: (a) the amplitude V m (b) the period T, (c) the frequency f and (d) v(t) at t = 10 ms. Problem 2 - A current source in a linear circu ...
|
1. (a) Name the three major groups of contamination and briefly describe their physical characteristics. (b) Where do the above contamination types come from? Give one example of each. 2. Name two processes metrics which ...
|
Research report 1. Read 3 to 4 journal articles about digital control or industrial control, eg. one particular application, implementation aspect such as selection of sampling time, hardware etc. No text book example is ...
|
Questions - Q1. A single-phase transformer rated 2.1 kV/130 V, 7.8 kVA has the following winding parameters: r1= 0.7Ω, x1 = 0.9Ω, r2 = 0.04Ω and x2 = 0.05Ω. Determine: a. The combined winding resistance ________ Ω and le ...
|
Problem # 1: Given a sequence x(n) for 0≤n≤3, where x(0) = 1, x(1) = 1, x(2) = -1, and x(3) = 0, compute its DFT X(k). (Use DFT formula, don't use MATLAB function) Problem # 2: Use inverse DFT and apply it on the Fourier ...
|
|