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Q. Briefly explain about Wye-delta transformation?
Certain network configurations cannot be reduced or simplified by series-parallel combinations alone. In some such cases wye-delta (Y- ) transformation can be used to replace three resistors in wye configuration by three resistors in delta configuration, or vice versa, so that the networks are equivalent in so far as the terminals (A, B, C) are concerned, as shown in Figure. For equivalence, it can be shown that
For the simple case when RA = RB = RC = RY, and RAB = RBC = RCA = R , Equations (1) and 2) become
Q. Designing 100 line exchange using Uni-selector? Here three different designing methods for 100 line exchange are discussed: Design: Strowger switching system is designe
State by inspection (i.e. without performing any formal analysis) all you can about each of the periodic waveforms shown in FIGURE 1 in terms of their Fourier series when analysed
biography of scientists in different branches
Q. A signal with bandwidth of 100 MHz is to be transmitted 40 km by LOS radio transmission. Taking B/fc = 1/30, and using a circular-aperture parabolic dish with 50-cm radius at ea
Q. Basic aspects of electromechanical energy converters? Whereas detailed differences and particularly challenging problems emerge among various machine types, this section bri
What is Inductance Inductance - the property of an electric circuit by which an electromotive force is induced in it as the result of altering magnetic flux. Electromagn
region of convergence of (Z+2)*(12z-1)/((3z-1)*(4z+1 ))
Q. Show Power and Power Factor in ac Circuits? Power is the rate of change of energy with respect to time. The unit of power is a watt (W), which is a joule per second (J/s). T
what is emitter efficiency
Issue In Sub-Transmission and Distribution Systems The major issue in Sub-transmission and Distribution systems or rather the issue confronting the power sector as an overall,
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