I = 20 mA /3209 O + Question (2) Redo questions (1) for system in Fig. 2 E = 80 V / 40º Question (1 Values are in rms Determine: (a) The impedance, resistance, reactance (b) Voltage across the resistance and reactance (c) Real power, reactive power, apparent power, and power factor Fig. 2 ?
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- If E = 1.05 p.u. leading by 25 degrees, feeding infinite bus bar through a reactance of 0.35. Find the reactive power flowing. a. 0.138 b. 1.514 c. 2.618 d. 0.43Q.1) A single phase load consisting of 5 2 in series with an inductance of 0.02297 H is operated in a phase control mode with a of 90°. The source is 240 V RMS, 60HZ. Find: a) Draw the waveform of VTI and VR. b) Find the conduction angle (6). c) Calculate the RMS value of load current. d) Find the power factor e) What is the minimum value of a for which phase control is in effet. f) Find the size of the first three terms in the Fourier series for the current. T Zoom(b) An inductive load consisting of resistor, R and inductor, L in series feeding from a 240430° Vrms, 50 Hz supply consumes 6 kW at lagging power factor of 0.88. (i) Determine the current through the load. (ii) Find R and L. (iii) Draw the phasor diagram of supply voltage and current.
- Q2 (a) A sinusoidal voltage waveform with r.m.s value of 21.213 V passes through one complete cycle in 1 ms. The magnitude of the voltage at zero time is 15 V. Determine the expression of the voltage in cosine form. State the phase angle in degree.Q2. For the circuit shown below, sketch the current waveforms iş and io and determine the Average and RMS for both currents. a = 50° TI 50 2 Vs = 300 sin 100zt ( cot T2 in cotDefine what we mean by “power-factor correction.” For power-factor correction of an inductive load, what type of element should we place in parallel with the load?
- If the voltage and current supplied to a circuit orload by a source are˜VS = 170∠(−0.157) V ˜IS = 13∠0.28 Adeterminea. The power supplied by the source which isdissipated as heat or work in the circuit (load).b. The power stored in reactive components in thecircuit (load).c. The power factor angle and power factor.You have been asked to investigate the loading effects on an alternator supplying a load and also charging a car battery at the same time. The output of the alternator has been rectified to smooth dc, and the circuit is shown below. Using Kirchhoff analysis, determine the initial current in each section along with its direction and the potential difference across the load.Q2. A series of motor (Load 1) and lighting (load 2) are connected to an AC source as shown in Figure Q2. The AC source, Vs, supplies 415420° V with frequency 50 Hz. Based on this information: 50 100 mH 150 Load 1 Load 2 i) Calculate the total load impedance Vs ii) Calculate the current, I. Figure Q2. (iii) Write the waveform expressions in frequency domain for Vs and I. Draw a phasor diagram consists of Vs and I and state the relationship between Vs and I. (iv) Determine the power factor and calculate the real power, reactive power and apparent power. Establish the power triangle for the load.
- An industrial installation has a power factor of 0.85 in backward. The demand is 150 KVA, and the operating voltage is 4800 V at 60 Hz. What should be done to bring the power factor to 0.95 in lagging? Indicate what you would connect and with what three-phase power. If the connection of the element to be added is in delta, indicate its reactance and the value of its capacitance or inductance. capacitance or inductance.In U.S. residences, electrical power is generally utilized at a nominal voltage of 120 V rms. What problems would become pronounced if the power distribution system and household appliances had been designed for a lower voltage (say, 12 V rms)? For a higher voltage (say, 12 kV)?A resistor of 4 ohmsisconnected in parallel with an impedancecoil whose resistance and inductive reactance are 3 ohms and 9 ohms, respectively. Determine the total current, in amperes, taken from a supply voltage of 120-V RMS sinusoidal source. A resistor of 3 ohmsis connected in parallel with the series combination of a resistor whose resistance is 8 ohms and a capacitorwhose capacitive reactance is 13 ohms If the capacitive branch carries a 5-A RMS sinusoidal current, calculate the total power, in watts, drawn from the supply. Three loads A, B, andC are connectedin series. Load A con sists of a resistor R. Load B con sists of an impedan ce coil with resistance of Ru andreactance of XL connected in series. Load C consists of a lossy capacitor with Rc and Xc in series. The voltages across A, B. and C are 64 volts, 40 volts, and 104 volts, respectively. The current supplied by the 192.66551-volt RMS sinusoidal source is 8 A operating at 0.996546 leadingpower factor. CalculateR, RL, XL,…