Find the Thévenin and Norton equivalent circuits for the circuit shown in Figure 2. Find the maximum power that this circuit can deliver to a load if the load can have any complex impedance. Repeat if the load must be purely resistive. + 50/0° 10 Ω w 10 Ω ww +j10 Q2 2000 15/0° A

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Impedances Z2 and Z3 in parallel are in series with impedance Z1 across a 100 V, 50 Hz ac supply. Z1 =6.25 + j1.25 ohm; Z2 = 5+ j0 ohm and Z3 = 5-jXc ohm. Determine the value of capacitance of Xc such that the total curent of the circuit will be in phase with the total voltage. When is then the circuit current and power.

5. Two ac sources feed a common variable resistive load as shown in figure. Under the maximum power transfer condition, the power absorbed by the load resistance RL is? 11020° 602 w 18.0 m 652 802 Mm 9020°

Assume that the voltage applied to a load is V = 208- 30° V and the current flowing through the load is I = 5415° A a. Calculate the complex power S consumed by this load. b. Is this load inductive or capacitive? c. Calculate the power factor of this load. d. Calculate the reactive power consumed or supplied by this load. Does the load consume reactive power from the source or supply it to the source?

d. 565.685 V If a Load absorbs 20 kVA at a leading power factor of 0.6. Then the complex power is: Select one: O a. 12000 - j16000 VA O b.-12000 + j16000 VA O c. 12000 + j16000 VA O d. None of these Given the circuit below and the associated set of voltages and currents, the reactive Power developed by im voltage source is FENG300 MINTERM

The impedance Z1 = 6+j8, Z2 = 8 -j6 and Z3 = 10+j0 ohms measured at 50Hz from three branches of a parallel circuit. This circuit is fed from a 100-volt 50-Hz supply. A purely reactive (inductive or capacitive) circuit is added as the fourth parallel branch to the above three-branched parallel circuit so as to draw minimum current from the source. Determine the value of L or C to be used in the fourth branch and also find the minimum current.

Z1=6+j5 Z2=-j5 Z3=j7+6 Z4=8+j4 Z5=12-j4 Z6=3+j5 Vs1=10sin(wt +75) Vs2=8 cos(wt-60) Vs3=15 cos (wt-50) Find the complex power supplied by all sources?

1. Three impedances Zı = 1 – j4, Z2= 0 – j6 and Z3 = 4 +j3 ohms respectively are connected in series parallel. Zı is connected in connected in series with the parallel combination of Z2 and Zz. Determine the equivalent impedance of the combination.

4. With respect to the following figure, explain why v。 does not follow v₁ until Và – Vỵ and follows only when v₁ ≥ VB - Vy in the positive half cycle? What happens in the negative half-cycle? Explain. Assume a sinusoidal current of losin(ot) from v₁, what is the voltage drop across R when vo follows vi and Vo does not follow v₁. www + R D VI vo VB-Vy VI Vo