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Q. Explain Current-to-Voltage Amplifier?
The basic circuit is shown in Figure, which is similar to that of an inverting amplifier. The - input is connected directly to a current source supplying current iS. Node X is a virtual ground, so that
iS = - vo / Rf
Hence
vo = - RfiS
which shows that the degree of amplification depends on the value of Rf.
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
Working and block diagram
Q. Find the voltage gain of the overall circuit? (a) Consider the circuit of the inverting amplifier shown in Figure (a), including an ideal op amp. Show that the voltage gain
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Q. Find the line current after the addition of capacitor bank? A 60-Hz, three-phase motor draws 25 kVA at 0.707 lagging power factor from a 220-V source. It is desired to impro
Q. The self and mutual inductances of a machine with two windings are given by L 11 = (1 +sin θ), L 22 = 2(1 + sin θ), and L 12 = L 21 = M = (1-sin θ). Assuming θ = 45°, and le
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