Three coils each having resistance of 12 Q and the phase current 18 A are connected in delta across 415V, 60 Hz supply. Then total power consumed in watts is,
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- A source supplies power to the following three loads connected in parallel: (1) a lighting load drawing 10kW. (2) an induction motor drawing 10kVA at 0.90 power factor lagging, and (3) a synchronous motor operating at 10hp,85 effIciency and 0.95 power factor leading (1hp=0.746kW). Determine the real, reactive, and apparent power delivered by the source. Also, draw the source power triangle.A coil-A of inductance 80 mH and resistance 120 Ω, is connected to a 230-V, 50 Hz single-phase supply. In parallel with it in a 16 μF capacitor in series with a 40 Ω non-inductive resistor B. Determine a.) the power factor of the combined circuit and b.) the total power taken from the supply.A circuit consisting of a resistor in series with an inductance takes 210W at a power factor of 0.6 from a 50V, 100 Hz supply. Find (a) the current flowing, (b) the circuit phase angle, (c) the resistance, (d) the impedance and (e) the inductance.
- Two coils are connected in series. With 2 A d.c. through the circuit, the p.ds. across the coils are 20 and 30 V respectively. With 2 A a.c. at 40 Hz, the p.ds. across the coils are 140 and 100 V respectively. If the two coils in series are connected to a 230-V, 50-Hz supply, calculate (a) the current (b) the power (c) the power factor.The total reactive power of an AC circuit having power factor of 0.85 leading is 40kVAR. The true power drawn by the circuit is: PS: please write in detailed solution.A circuit is composed of a resistance of 22 ohms, an inductance of 0.11 henry and a capacitance of 12 microfarad, all connected in parallel to a 115-volt 60-Hz supply. Calculate the (a) total current, (b) total reactive power, (c) and the power factor of the cicruit.
- A coil impedance of 68Ω is connected and the circuit has capacitance of 0.002mF is connected to a 215V, 50 Hz supply. Calculate (a) the current flowing, (b) the phase difference between the supply voltage and current, (c) the voltage across the capacitance and (d) the voltage across the resistor. Draw the phasor diagram.(b)A circuit consisting of a resistor in series with an inductance takes 210W at a power factor of 0.6 from a 50V, 100Hz supply. Find (a) the current flowing, (b) the circuit phase angle, (c) the resistance, (d) the impedance and (e) the inductance.A resistance of 1.5kΩ, an inductance of 2.5H, and a capacitor of 6 micro Farads, each are connected in parallel with a 220-V generator, with frequency 60 Hz. a) What is the phasor relationship between the current and the voltage in the circuit? b) Calculate the real(P) power c) Calculate the reactive(Q) power d) Calculate the apparent(S) power
- A series circuit composed of a resistance of 24 ohms, an inductance of 0.09 henry and a capacitance of 8 microfarad, is connected to a 120-volt 50-Hz supply. Calculate the (a) power factor of the circuit, (b) total reactive power, (c) voltage drop accross the inductor.A resistor of 6 ohms and an unknown impedance coil in series draws 12 A from a 120 V, 60 Hz line. If the real power taken from the line is 1152 Watts, what is the coil inductance?A resistor R and an impedance coil Z are connected in series. The combination is supplied bya 120-volt, 60 Hz AC source. The voltage across R and Z are 70 volts and 80 volts,respectively. The entire circuit consumes 1,153.12 inductive vars. Determine the following: a. Power factor of the impedance coilb. Total currentc. Impedance of the coild. Resistance of the impedance coil