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Q. Explain about Differentiator?
Shown in Figure is a differentiator which is obtained by replacing R1 in the inverting amplifier of Figure by a capacitor C. Assuming ideal op-amp characteristics, one has i = iC and vo = - Ri = - RiC. But since iC (t) = Cdvin (t) /dt ,we get
vo (t) = - RC dvin (t) / dt
which corresponds to a differentiator with a gain of -RC. In practice, however, differentiators are normally avoided because of high-frequency noise (which is accentuated due to a transfer function that increases with frequency) and stability problems (which make them oscillate).
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Illustration the basic working principle, process parameters, economics, safety precautions and applications of plasma Arc Machining process(PAM) Discuss Electron Beam Machining
Q. A three-phase ac motor, used to drive a draft fan, is connected to a 60-Hz voltage supply. At noload, the speed is 1188 r/min; at full load, the speed drops to 1128 r/min. (a
kindly tell me which text book is usefull forlearn the basic electricle.
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Q. A particular BJT has a nominal value of α 0.99. Calculate the nominal β.If α can easily change ±1%, compute the percentage changes that can occur in β.
Metering Standards Relevant standards on metering are given in Table. Table: Relevant Metering Standards Standards Description
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