A three-phase 400 V, 60 Hz delta connected load has three equal impedances each of (10+j50) 2. What is the value of inductance?
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- Let a 100V sinusoidal source be connected to a series combination of a 3 resistor, an 8 inductor, and a 4 capacitor. (a) Draw the circuit diagram. (b) Compute the series impedance. (C) Determine the current I delivered by the source. Is the current lagging or leading the source voltage? What is the power factor of this circuit?Figure 2 shows three "LC" circuits, two of them with capacitors of capacitance "C" and the three with inductance coils "L", the three circuits are coupled by means of two capacitors "Cc" capacitors. inductance "L", the three circuits are coupled by means of two capacitors of capacitance "Cc". The currents circulating through each mesh are those indicated in the figure: "I1", "I2" and "I3". Using Kirchhoff's law for voltages and taking into account the definition of current I = -dQ/dt, find the system of coupled equations of the system and then find the angular normal frequencies of the system.A utility company plans to connect a total of 20uF of capacitance to a 7200 volt line. To make this connection four capacitors will be connected in series. What is the capacitance of each capacitor? Answer is 80uF. Now what is the minimum AC voltage rating of each capacitor?
- 1. A load of 50 ohms resistance and 0.4 H inductance are connected in series to 100 volts, 60 hz a-c source. What must be the value of the capacitance to be connected in parallel to the circuit to raise the power factor to 0.96 lagging. Draw the circuit diagram.Figure 2 shows three "LC" circuits, two of them with capacitance capacitors "C" and the three with inductance coils "L", the three circuits are coupled by means of two capacitance capacitors "Cc". The currents that circulate through each mesh are those indicated in the figure: "I1", "I2" and "I3". Using Kirchhoff's law for voltages and taking into account the definition of current I = −dQ / dt, find the system of coupled equations of the system and then find the normal angular frequencies of the system.1. Enumerate five formulas for five series connected inductances across Vt source and draw the circuit. 2. Enumerate five formulas for five parallel connected inductances across Vt source and draw the circuit.
- A 25ohm resistor is connected in series with a %0 mH inductor. This circuit is connected to a 120V, 50Hz supply. Solve for a. Inductive reactance b. impedance c. S d. P e. QFor figure (1)draw and calculate the voltages waveform across each half of secondary winding and across load when 100sin2π60t applied across the primary, then find PIV.A pure resistance of 50 ohms is in series with a pure capacitance of 100 microfarads. The series combination is connected across a 100 volt, 50 hz source. Find the a) impedance, b) phase angle, and c) equation of the current
- The maximum efficiency for pure inductance load and iron-losses = cupper losses is zero. O True O Falselow voltage systemsWhich of the following is true in pure inductive circuit? a) Current can be 90 forward or backward. b) Current in phase with voltage. c) The current lags behind the voltage by 90. d) Current stays beyond 90 ° to voltage.An inductive reactance of 6 ohm is connected in series with a parallel combination of a variable resistor R and a capacitive reactance of 15 ohm across 100V , 50 hz supply. a. Solve for the frequency so that the magnitude of the inductive reactance is 2 times the magnitude of capacitive reactance. b. Solve for the value of R so that the total current I will be maximum.