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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. The voltage at terminal a relative to terminal b of an electric component is v(t) = 20 cos 120πt V. A current i(t) =-4 sin 120πt A ?ows into terminal a. From time t 1 to t 2 ,
Q. A transformer has its maximum efficiency of 0.9800 when it delivers 15 kVA at unity power factor. During the day it is loaded as follows: 12 hours 2 kW at power factor 0.5
how does a zener diode works
Saturation and Cutoff in bipolar junction transistor: Saturation : With both of the junctions forward-biased, a BJT is in saturation mode and makes easy high current condu
Q. Explain the application of clippers. There are numerous clipper applications. In general clippers are used to perform one of the following two functions: · Changing the s
Detection and Handling of Gas Leakage : If you are using a toxic gas or have a store for it you must have some devices to indicate the leakage, if any. Though numerous monitoring
user defined function
Number Systems Various number systems are decimal ( used by human beings) binary ( used by digital systems) octal and hexadecimal (used to represent binary numbers in small
what are the disadvantages of superposition theorem?
Multiprogramming - Single Processor one Users Many Programs When single processor is used to execute more than one independent program simultaneously the technique is ca
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