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An industrial plant consumes 500 kWat a lagging power factor of 0.6.
(a) Find the required kVA rating of a synchronous capacitor to improve the power factor to 0.9.
(b) If a 500-hp, 90% ef?cient synchronous motor, operating at full load and 0.8 leading power factor, is added instead of the capacitor in part (a), calculate the resulting power factor.
Explain effect of frequency of applied electric field. If an external electric field is applied, the distance among charges that is related to chemical bonding keeps constant i
Athree-phase,wye-connected, 220-V, 10-hp, 60- Hz, six-pole inductionmotor (using Figure 13.2.6 for notation) has the following parameters in ohms per phase referred to the stator:
Q. For a transistor, when v GS = -2.0 V, find V DSsat if Vp= -4.0 V for an n-channel depletion mode MOSFET. Solution: V p = -(V DSsat + v SG ) but v SG = -v GS = -(-
transfer function of Lube Oil Cooler Temperature
FET Parameters A basic, low-frequency hybrid-pi model for the MOSFET is displayed in figure. The several parameters are as follows. is the transconductance in siemens
explain electromechanical instrument
Figure 1(a) shows a simple one-stage MOSFET amplifier. The input-output relationship is graphed in Figure 1(b), where the solid curve indicates operation in the saturated region an
Q. Let v(t) = Vmax cos ωt be applied to (a) a pure resistor, (b) a pure capacitor (with zero initial capacitor voltage, and (c) a pure inductor (with zero initial inductor current)
For an operating point half way up the parallel section and the discharge valve and the discharge fully open, design a proportional only controller which will give closed loop dyna
tension and sag problems
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