sketch a labeled equivalent circuit of a 3 phase synchronous generator having an output voltage E supplying load P + jQ through an impedance R + jX when voltage at the load is V
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Q: Find ilt) after the switch closes t=0 же V₁ = 40v V₂ = 20V R = 1000 J L = SH c = 250 μF +1
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- In capacitive AC circuit voltage is leading current O a. True O b. FalseA single-phase AC voltage controller has a resistive load R = 10 Ohm, and the RMS input voltage is Vs = 230 V, 60 Hz. The delay angle is 120 degree. Then power factor of the circuit is: Select one: O a. 1 O b. 0.75 O c. 0.44 O d. None of the above O e. 0.9Single phase control AC voltage regulator with an inductive load connected with AC power Vs-220 vrms F-120 Hz. resistance is 1.50 L-5mH and phase angle is 45 determine the P.F. 0.69 O 0.65 O 0.45 O 0.95
- 6.5% ans ex A so kvA. 2o00/20 V, So He single-phase transformar has impedance drof of8% and resistance drop of 4%. Caleulate. The Requlation of the Thams former at full- Load o8 P.s Legging. also find The Power factor at which Voltage requlation will Be Zero. Sols 0.5 leading. s alculate The % Noltege Requlation af atransformar in w hich the Percantage resistance drof is 1% and Percentage dre is 6% when The Power fador is 0.8 lagging ) > unity aMS 38 % ans 1 % (シ→ 0.8 leading . amS - 2.2%The voltage applied to the metal grid of CRO is positive with respect to cathode. Select one O True O False The DC generator has both shunt and series field winding which wound on to the same poles. O Shunt O separately excited MIEE211 O Series O CompoundThe step down DC chopper uses DC source voltage V(dc) = 200 V and resistive load impedance of 10 ohm. The duty cycle is 0.4 the voltage drop across the switch may be taken as zero, Calculate : (a) Average and RMS value of output voltage. (b) Average and RMS value of output current.
- In the equivalent circuit, when the slipio 1 Cire at stert) rotor cirouit has much lower impedance than magnetising eircuit. At start approximates to: Iph Cfull) Toad' Ri Vph. craduced) XI+x² Cequele Xea) can be obtained from the input reactive R1+ RZ' CRTeStator Resistance & RZé Ro tor Resistanca) c20 be obtained from the input. powerand current pawer and current Total real power P=3 CIine) CR the) W Total absgrbed nductor reactive pawer Qy = 3E Lined. Xeq VAr The mea sured eddy corrent prake torque O.48 Nm. The line corrent is 4.94A, Total (3ph) inputreal power is 214.7W. The Statorphae resistance is Voltage CVey)s 29.V, stahr What is Xeq, R1+R2, R), R2A single-phase AC voltage controller has a resistive load R = 10 Ohm, and the RMS input voltage is Vs = 230 V, 60 Hz. The delay angle is 120 degree. Then the RMS output voltage is: Select one: O a. 101 V O b. 39 V O c. None of the above O d. 143 V O e. 215 VA single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)
- Let a 100V sinusoidal source be connected to a series combination of a 3 resistor, an 8 inductor, and a 4 capacitor. (a) Draw the circuit diagram. (b) Compute the series impedance. (C) Determine the current I delivered by the source. Is the current lagging or leading the source voltage? What is the power factor of this circuit?A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R = 10 ohms, L = 20mH and frequency of 1000rad / s, the current measured is 2.2361A at 89.44 leading power factor. A) Determine the initial capacitance. B) However, a fault occurs on the capacitor branch making its capacitance 20% lower and a resistance of 5 ohms is detected. If this faulty circuit is rerun but at a frequency of 500 rad / s, determine the new current that will flow through the circuit.Problem- Basics of Chopper & Types Calculate the R.M.S value of the fundamental component of current in a single phase Half bridge having a resistive load of 109 and supplied by an input DC voltage of 50V?