A certain series RC ac circuit has an instantaneous power of p(t) = 125/2 - 250 cos(240rt + 15') Find the power factor.
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- The rms value of v(t)=Vmaxcos(t+) is given by a. Vmax b. Vmax/2 c. 2Vmax d. 2Vmaxwhat is the reactive power absorbed by the load ZL in VAR? Assume source is in rmsDetermine the complex power, power, reactive power, and apparent power absorbed by the load in Figure T5.6. Also, determine the power factor for the load.
- The equation of alternating voltage isgiven by ν = 325.22 ???314?.Find (i) RMS value (ii) Frequency (iii)Average value.A 15ohms resistor connected in parallel with an impedance of 8 - j2 across an AC source. The entire circuit takes a total average power of 2000 watts. What is the average power in the 15ohms resistor?Given below are Za=Zb=Zc=(25+j5) Ω : Calculate the total average, reactive and complex powers?
- When you are converting an instantaneous current to a phasor, how does the phase angle being positive or negative affect solving the problem i.e. the representation being (wt - the phase angle in degrees) or (wt + the phase angle in degrees)?An rms voltage of 22.2 V with a frequencyof 1.00 kHz is applied to a 0.290-mH inductor. (a) What is the rmscurrent in this circuit? (b) By what factor does the current changeif the frequency of the voltage is doubled? (c) Calculate the current for a frequency of 2.00 kHzAn alternating current varying sinusoidally, with a frequency of 50 Hz has an rms value of 20 A. Write down the equation for the instantaneous value and find this value at (a) 0.0025 s, and (b) 0.0125 s after passing through a positive maximum value. At (a) 0.0025 s, and (b) 0.0125 s after passing through a positive maximum value. At what time, measured from a positive maximum value, will the instantaneous current be14.14 A?
- A 120V adjustable frequency ac source is connected in series with a resistor, an inductor, and a capacitor. At 60Hz, the resistance is 5 ohms, the inductive reactance is 3 ohms, and the capacitive reactance is 4 ohms. Compute: (a)load impedance at 60Hz (b) value of the capacitance and inductance Explain each step.A capacitor "C", an inductor "L" and a switch "S" are connected in series. When the switch is open, the plate to the left of the capacitor has charge "Qo". The switch is closed the load and current vary sinusoidally with time. Represent graphically the load "Qo" and the intensity of current "I" as a function of time "t", and explain why the current leads the load by a phase difference of 90°.Consider the circuit shown in Figure T14.6 which has Rs=0.5 Ω, RL=1000 Ω, and N1/N2=0.1. a. Determine the rms values of the currents and voltages with the switch open. b. Repeat with the switch closed.