A balanced three-phase load consists of three coils, each of resistance 4 Ω and inductance 0.02 H. Determine the total active power when the coils are (a) star-connected, (b) delta-connected to a 400 V, three- phase, 50 Hz supply.
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A balanced three-phase load consists of three coils, each of resistance 4 Ω and inductance 0.02 H. Determine the total active power when the coils are (a) star-connected, (b) delta-connected to a 400 V, three-
phase, 50 Hz supply.
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- 3. Two circuit elements in series consume 60 VAR when connected to a 120 – V, 60 – Hz source. If the reactive factor is 0.6, what are the two components and what are their values?When a voltage of 100V at 50Hz is applied to an impedance coil A, the current taken is 8A and the power is 120 W. When applied to an impedance coil B, tue currents is 10 A and the power is 500W. What current and power will be talen when 120V, 60 Hz is applied when two coils are connected in parallel?57. An RLC series circuit connected to a 110-volt and 50-cycle AC source, contains the following series resistances and reactances: R1=10 ohm, R2= 15, XL1=20 ohms, XL2=25 ohms, XC= 40 ohms. Find the following a. Total inductance in millihenry b. total current c. reactive power
- A single-phase semi-converter is operated form 120 V, 50 Hz AC supply at a firing angle of 30 degrees. The load is such that the load current is continuous and ripple-free. Displacement factor of the converter is: (a) 0.77 (c) 0.67 (b) 0.97 (d) 0.57A 25-ohm resistor connected in series with a coil of 50-ohm resistance and 150-mH inductance. What is the power factor of the circuit? The standard frequency is 60 Hz. Show complete solution.A2 KO resistor and 30 mH inductor are connected in series, across a 120 V A.C power source oscillating at 60 Hz frequency .Calculate i) The current in the circuit i) The voltage drop across the resistor & inductor ii) The power dissipated in the circuit. iv) The apparent power & reactive power in the circuit. v) Draw the phasor diagram.
- Use 3 decimal places and box the final answer. A 4-ohm resistor is in series with a 7.96-mH inductor connected across a 110-V 60-Hz source. Determine : a) the impedance b) the input current c) the voltage across the resistor and the inductor d) Draw the phasor diagram showing the current and the voltages. e) The power factor and the power input to the circuit.2. A coil of resistance 52 is connected in series with two inductance coils 120mH and 25mH connected 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 coil and (d) the voltage across the resistor. Draw the phasor diagram.A sinusoidal voltage with effective value (73 V), and a Frequency its value (80 Hz), was applied on a series circuit that consists of a coil with inductance of value (0.05 H), and a resistor of value (5 0). Calculate: 1. The maximum value of the voltage? 2. The inductive reactance of the coil? 3. The electric impedance of the circuit? 4. The maximum value of the generated current in the circuit? 5. The phase angle? 6. The power factor? 7. The power dissipated inside the coil? 8. Draw a diagram showing the results?
- A Star 3Phase source with phase voltage of 400V at 50HZ is connected to a delta connected 3Phase AC Motor. The transmisson line resistance from source to load terminal is 1 Ohm. The internal resistance of each winding of motor is 9 Ohm and the inductance of each coil is 38.2 mH. What is the true power delivered to load? O A) 13099 B) 14999 O C) 15099 O D) NoneA sinusoidal voltage with effective value (73 V), and a Frequency its value (80 Hz), was applied on a series circuit that consists of a coil with inductance of value (0.05 H), and a resistor of value (5 N). Calculate: 1. The maximum value of the voltage? 2. The inductive reactance of the coil? 3. The electric impedance of the circuit? 4. The maximum value of the generated current in the circuit? 5. The phase angle? 6. The power factor? 7. The power dissipated inside the coil? 8. Draw a diagram showing the results?Three identical coils, each of resistor 8ohm and inductor 15ohm are connected in star to a phase voltage of 210V, 50 Hz, 3-phase supply. Determine the total power dissipated. Select one: O a. 3.66KW b. 4.8KW O c. None of these O d. 2.4KW