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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
Q. Give an introductive notes about FET amplifier ? The small signal models for the common source FET can be used for analyzing the three basic FET amplifier configurations: (
what is the effect of back emf ?
i have question
Common-collector configuration: The common-collector that is abbreviated CC transistor configuration is displayed in figure. In this type of configuration, the collector is
The voltage across a 1 - μF capacitor is given. Which is the sinusoidal expression for the current? a) 30 sin200t b) 70cos (800t - 20°) At what frequency will the re
Consider the following signals, sketch each one of them and comment on the periodic nature: (a) x(t) = A cos(2πf 0 t + θ), where A, f 0 , and θ are the amplitude, frequency, and
Hall Effect experiment: Prob. Write short note on Hall Effect and its applications. What properties of a semiconductor are determined from a Hall Effect experiment? Sol.
Q. An inverting amplifier is designed with three inputs, v 1 , v 2 , and v 3 , as shown in Figure. Determine the output voltage. Then indicate how the circuit may be modified to pe
power factor improvement
Q. For the circuits shown in Figure, sketch the frequency response (magnitude and phase) of ¯V out / ¯V in .
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