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Q. A synchronous motor operates continuously on the following duty cycle: 50 hp for 8 min, 100 hp for 8 min, 150 hp for 10 min, 120 hp for 20 min, and no load for 14min. Specify the required continuous - rated hp of the motor. (Note : A motor rating is normally chosen on the basis of the rms value given by)
where k is a constant accounting for reduced ventilation at standstill.)
A conductor 300 mm long moves at a uniform speed of 4 m/s at right-angles to a uniform magnetic field of flux density 1.25 T. Verify the current flowing in the conductor when (
Q. Explain workinf of colpitts oscillator? When the collector supply voltage V cc is switched on, the capacitors C1 and Cz are charged. These capacitors C1 and Cz discharge thr
The circuit shown below is a DC charging and discharging circuit. a. At t = 0 sec, switch S1 is thrown to position 1 ("pos1"). Write the mathematical expressions for and .
Q. Discuss the closed-loop behavior? Consider an elementary feedback control system, as shown in Figure, with H = 1. The output variable c and the input e to the direct transmi
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 present window that is being used.
V-I Characteristics In the normal mode of operation of an IGBT a positive voltage is applied to the collector relative to emitter. When the gate is at zero potential wi
Designated Consumers - Features of Energy Conservation The Act gives the list of designated consumers, which involves the energy intensive industries, Railways, Port Trust, Tr
Q. A 20-kVA, 2200:220-V, 60-Hz, single-phase transformer has these parameters: Resistance of the 2200-V winding R1 = 2.50 Resistance of the 220-V winding R2 = 0.03 Lea
material to produce analog oscilloscope
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