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Q. Find the frequency of oscillation, amplifier gain ?
The transfer function is found to be
where the equation is written as a Laplace transform (s=jw). Analysis of this function will reveal that the frequency of oscillation is and the amplifier gain, A, must be 29 =
Q. A three-phase, 60-Hz induction motor runs at almost 1800 r/min at no load, and at 1710 r/min at full load. (a) How many poles does the motor have? (b) What is the per-unit
(a) Consider the following transmission line with the reactance X1 placed across the input. It is being driven with a frequency ω such that the length of the line is λ/4. W
Describe in detail the construction and working of digital type oscilloscope.
what is pole core and pole shoe in a dc machine
Delay time ( t d ) Initially a thyristor remains in forward blocking stat when anode to cathode forward voltage is applied and gate to cathode circuit is opened. As t
Q. A three-phase balanced load draws 100 kW at 0.8 power factor lagging. In order to improve the supply power factor to 0.95 leading, a synchronous motor drawing 50 kWis connected
Q. Resultant air-gap flux of induction machine? The resultant air-gap flux is produced by the combined mmfs of the stator and rotor currents. For the sake of conceptual and ana
The inputs to an SRFF are shown in Figure. Determine the value of Q at times t 1 , t 2 , and t 3 .
Q. What is a heat sink? List the factors, which determine its efficiency. To reduce the chance of thermal runaway, the rise of temperature at the collector junction to a danger
Explain Nodal analysis (supernode)
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