Consider the following waveform. Volts 4 18 12 t (sec)
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- If the rms phasor of a voltage is given by V=12060 volts, then the corresponding v(t) is given by (a) 1202cos(t+60) (b) 120cos(t+60) (c) 1202sin(t+60)An AC generator having an internal resistance of 2 k*(omega) is connected to an LCR circuit in series as shown in the figure. If the generator supplies an electromotive force, E = 282 sen (100*pi*t) volt, calculate:a) the impedance of the circuitb) the rms value of the current in the circuitc) the voltage drop across L, C and RA 3 phase 10 pole 600 rpm delta connected alternator has 12 slots/pole with 8 conductors per slot. The windings are short chorded by 2 slots. The flux per pole contains a fundamental of 100 mwb, the third harmonic having an amplitude of 33% and fifth harmonic of 20% of the fundamental. Determine the rms value of the phase ,line voltages and Circulating Current Please answer in typing format please
- A supply voltage v given by v = (240 sin 314t + 40 sin 942t + 30 sin 1570t) volts is applied to a circuit comprising a resistance of 12 ohmconnected in series with a coil of inductance 9.55 mH. Determine (a) an expression to represent the instantaneous value of the current, (b) the rms voltage, (c) the rms current, (d) the power dissipated, and (e) the overall power factor.The three-phase average power rating of the central processing unit (CPU) on a mainframe digital computer is 20,000 W. The three-phase line supplying the computer has a line voltage rating of 144 V (rms). The line current is 88 A (rms). The computer absorbs magnetizing VARs. Calculate the total magnetizing reactive power (in VAR) absorbed by the CPU.The two loads shown can be described as follows: Load 1 absorbs an average power of 60 kW and delivers 70 kVAR of reactive power; Load 2 has an impedance of (24+j7) Ω. The voltage at the terminals of the loads is 25002 cos 120π t V.1. a) Find the rms value of the source voltage.2. b) By how many microseconds is the load voltage out of phase withthe source voltage?3. c) Does the load voltage lead or lag the source voltage?
- S.2) The serial impedance of the 300 km power transmission line is 23 + j75 ohm / phase and the shunt acceptance is j500 microS / phase. A power of 50 MW with a power factor of 0.88 under 220 kV interphase voltage from the end of the power transmission line being shot. Using these data of the energy transmission line, a) Characteristic impedance of the energy transmission line, b) Natural apparent power of the energy transmission line according to the 220 kV interphase operating voltage, c) The values of the line parameters A, B, C and D of the transmission line using hyperbolic functions, d) Calculate the maximum power that the power transmission line can transmit.What is the rms value of the applied voltage?? Choose the correct answer.The three-phase average power rating of the central processing unit (CPU) on a mainframe digital computer is 20,000 W. The three-phase line supplying the computer has a line voltage rating of 144 V (rms). The line current is 88 A (rms). The computer absorbs magnetizing VARs. Calculate the lagging power factor.
- Derive the formula for Average Power, Pavg = VI cosθ watts, where V is the root-mean-square (rms) voltage in volts, I is the root-mean-square (rms) current in ampere, and cosθ is the power factor. For the derivation, use the sinusoidal voltage and current equations. The angle between the voltge and current is angle θ(i) An alternating voltage E=200 Sin 314t is applied to a device which offers an ohmic resistance of 20Ω to the flow of current in one direction, while presenting the flow of current in opposite direction. Calculate; (a) Rms Value (b) Average Value (c) Form Factor for the current over one cycleAn example power system has two distinct manufacturing areas, one with harmonic loads, and another with only linear loads. The portion of the system with the harmonic loads draws 75 A rms at 60 Hz, 10 A rms at 300 Hz, and 5 A rms at 420 Hz. The part of the system with only linear loads draws 75 A rms at 60 Hz. (i) What is the total load current (at 60 Hz) if both manufacturing plants are running? Calculate the THD. (ii) What is the total load current (at 60 Hz) if only the manufacturing plant with harmonic loads is running? Calculate the THD.