connected in parallel with an 90 Q resistor across a Vrms = 230<0° V, f = 60 Hz supply. Calculate (e) the power dissipated and (f) the apparent power IR Ic R C HH S = 650.3 VA P = 588 W P = 588 VA P = 588 VAR None from the above S = 812.4 VA Ic S = 770.5 VA IR
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- Assume that the voltage drop across the resistor, ER, is 78 V, that the voltage drop across the inductor, EL, is 104 V, and the circuit has a total impedance, Z, of 20 . The frequency of the AC voltage is 60 Hz. ETITZ20VAPFER78VIRRPEL104VILXLVARsLL2) A current of 250mA flows through a perfect inductor, when it is connected to a 5V, 1kHz supply. Determine the inductance value? 3) A coil of inductance 400µH, and of negligible resistance, is connected to a 5kHz supply. If the current flow is 15mA, determine the supply voltage? 4) A 0.47µF capacitor is connected to a variable frequency signal generator, which provides an output voltage of 25V. Calculate the current flowing when the frequency is set to (a) 200Hz, and (b) 4kHz? 5) At what frequency will the reactance of a 22 pF capacitor be 500 Ω?Given the capacitance of four capacitors Ca= 30 µF, Cb = 20 µF, Cc = 40 µF and Cd = 10 µF. If Cb and Cc are connected in parallel and the parallel combination is connected in series with Ca and the combination is further connected in parallel with Cd, calculate (a) the equivalent capacitance (b) the voltage across each capacitor if the circuit is supplied by 240 volts DC source (c) the charge on each capacitor.
- POWER SİSTEMS high voltage technique it is possible to measure pulsed (AND ANSWER THE SAME QUESTION FOR AC AND DC ) high voltages with the help of two spheres of equal radius placed on the same axis. In which case the approximate impulse,AC AND DC voltage value that can be measured with such a system with diameters of 500 mm and known spacing between them is 2.5 cm, is given correctly. (Ambient conditions are neglected and take Ed = 30 kV / cm2 k = 0.9) a) 68,65114 kV b) 81.30081 kv c) 97,08737 kv d) 65,35947 kv e) 57.48835 kv f) 46.21612 kv PLEASE ANSWER THE SAME QUESTION FOR DC HİGH VOLTAGE AND AC HİGH VOLTAGE WHAT THE DIFFERENCE BETWEEN THEMThe voltage across 20 micro-farad capacitor varies with time as given by vc = (10.75 - 1.5e -1000t) volts. What is the current through capacitor after 1 millisecond? 0.023 0.011 A 0.033 A 0.013 AAll capacitors were initially discharged. at t = 0, S1 is placed at position 1 and S2 is closed. During this phase, it has been determined that Eth and Rth seen by the equivalent capacitor are, respectively, 19 V and 3.5 kΩ. The equivalent capacitor is 1.50µF. Calculate the value of the current iT immediately after the switching occurred. Enter your answer in mA rounded to 2 decimal places. At t = 15 ms, S1 is placed at position 2 and S2 is kept closed. At t = 25 ms, S1 is kept at position 2 and S2 is opened. Data: R1 = 5 kΩ, R2 = 6 kΩ, R4 = 5 kΩ, R5 = 16 kΩ, R6 = 12.5 kΩ;
- A coil of 0.5 H inductance and 8 ohms resistance is connected in series with a capacitor across a 200 V, 50 Hz supply. If the current is in phase with the supply voltage, determine the capacitance of th the capacitor and the p.d. across its terminals. Answer: [20.26 µF, 3.928 k]A coil RL is connected in series with a capacitor across the 220 V, 60 hz, AC supply. If this circuit operates at 0.87 pf leading, determine the magnitude of this voltage, Assume voltage acrros the coil and the caapacitor are equal.A 230 kV, 3-phase, 50 Hz, 200 km transmission line has a capacitance to earth of 0.03 µF/km per phase. Calculate the inductance and kVA rating of the Peterson coil used for earthing the above system.
- Given a parallel RLC circuit comprised of the following element: 58.48-ohm resistor, ideal inductor with reactance of 74.07 ohms; and a capacitor with reactance of 19.78 ohms. Compute for true power in watts given an ac voltage source of 100 cis 0 volts. Compute to the nearest 4 decimal places. No Scientific notation. Do not round off in the middle of calculation. Use stored values.A LRC electric circuit is conected in series has a voltage source of E(t)=20sin(10t) Volts, and a resistance of 20 ohm, and a inductance of 0.05 Henrys and a capacitor of 0.01 Farads, if the current equal to 0, and the initial charge of the capacitor is 2 coulombs, Calculate the charge in the capacitor when t=0 and the current in the circuit when t > 0The voltage across a 75 mH inductor is described by the equation νL = (25 V) cos(60t), where t is in seconds.a. What is the voltage across the inductor at t = 0.10 s?b. What is the inductive reactance?c. What is the peak current?