Q3) An 880VA, 220V, 50Hz, load has a power factor of 0.8 lagging. What value of parallel capacitance will correct the load power factor to unity?
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- A telephone receiver has an impedance of 306 ohms at 800 cps and a resistance of 60 ohms. For what value of capacitance of a capacitor in series with the coil will the power factor be unity at 1,000 cps?When this resultant voltage is applied to a circuit consisting of a 10-Ω resistor and a capacitance of 17.3 Ω reactance connected in series, find an expression for the instantaneous value of the current flowing, expressed in the same formThe current flowing through a pure inductance 2mH is, l =(15 cos 300t) A. What is the (i) rms and average value of current for a complete cycle?
- d. What is the phasor and instantaneous voltage across the capacitor? e. If a 75μF capacitor is shunted across the load, what is now the value of the equivalent impedance in the connection?An industrial process requires a power of 10 kW with a lagging power factor of 0.6 in a single-phase system. It is desired to add a parallel capacitance to raise the power factor to unity. For a line voltage of 240 V rms, determine the value of capacitance required.Two sinusoidal voltages of the same frequency have rms values of 8 V and 3 V. What is the smallest rms value that the sum of these voltages could have? The largest? Justify your answers.
- If a current 5.0 A lags the applied voltage 230 V by an angle ϕ, it can be resolved into two components, OA in phase with the voltage and OB lagging by 90°. If the phasor diagram in to a circuit possessing resistance and inductance in series, OA and OB must not be labelled and respectively. It has become the practice to say that the power factor is laggingwhen the current lags the supply voltage, and leading when the current leads the supply voltage. This means that the supply voltage is regarded as the reference quantity. (a) A 30 μ F capacitor is connected across the applied voltage, 50 Hz supply. Calculate the reactance of 30 μ F capacitor connected across applied voltage (b) the reactance of the capacitor; (c) the current.A supply of 250 V, 80 Hz is connected across an inductive load and the power consumed is 2 kW, when the supply current is 10 A. Determine the following: 1.The value of capacitance (µF) connected in parallel with the load that is needed to improve the overall power factor to unity.A building with inductive loads has an average consumption of 40kW and 26 kVAR.What is the average current drawn in by the building and its effective impedance?
- A certain circuit element is known to be a resistance, an inductance, or a capacitance. Determine the type and value (in ohms, henrys, or farads) of the element if the voltage and current for the element are given by a. v(t) = 100 sin (200t + 30°) V, i(t) = cos(200t + 30°) A; b. v(t) = 500 cos(100t + 50°) V, i(t) = 2 cos(100t + 50°) A; c. v(t) = 100 cos(400t+30°) V, i(t) = sin(400t + 30°) A.When connected to a 120 V (rms), 60-Hz power line, a load absorbs 4kW at a lagging power factor of 0.8. Find the value of Capacitance, C, necessary to raise the power factor to 0.95 lagging.Calculate the capacitance that when placed in parallel with the load, will raise the power factor to unity. Please answer in typing format please ASAP for the like Please