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Q. A 75-kVA transformer has an iron loss of 1 kW and a full-load copper loss of 1 kW. If the transformer operates on the following load cycle, determine the all-day efficiency:
8 hours full load at unity power factor
8 hours no load
8 hours one-half full load at unity power factor
Explain the significance of V number. Ans: V number or V parameter or normalized cutoff frequency is one of the parameter which is used to calculate the maximum number o
Address Bus The address bus is the group of 16 lines. It is used to carry the address of memory location and addresses of input and output ports as shown. It is a unid
In a CDMA system, the signal is spread over a large bandwidth by multiplying the transmitted symbol by a sequence of short pulses, also called chips. The
Q. Explain working of CRT with suitable diagram discuss the focusing arrangement. What is need of aquadag? OR Why are the operating voltages of a cathode ray tube arran
For a helical antenna, the half-power beamwidth and directive gain are given by where C = πD, N = L/S, and S = C tan α,in which α is called the pitch angle, and The
Need help on Final exam with duration 2hrs30min
Q. In a differentiating circuit, R=10 kW,and C=2.2μF.If the input voltage goes from 0V to 10 V at a constant rate in 0.4s, determine the output voltage. Solution: e 0 =
These are small poles fixed to the yoke and spaced in b/w the main poles. They are wound with comparatively few heavy gauge Cu wire turns and are connected in series with the armat
Q. Comment brie?y on the following: (a) Why are waveguides not used at low frequencies? (b) Why are open-wire lines not generally used as guiding structures at very high freq
Q. Effect of feedback on stability? Let us consider the direct transfer function of the unstable first-order system of Figure (a). The transfer function is given by whe
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