6. For the following circuit.

Write down the node voltage equations that solve for it when: The system frequency is 1 kHz. II = 2.5<0 A and I 2=1<0 A (<= angle) (2 pts)

 

Answer:

Find the voltage difference between a and b using the node voltage method:

   2. Consider the following circuit (18 pts): 

2A) Use the node voltage method to find the voltage difference between nodes A and B for t<0 s. (3 pts)

Consider the full-wave rectifier circuit as shown below with C = 474 F and transformer winding ratio of 14:1. If the input voltage is 120 VAC (RMS) at 60 Hz, what is the load resistor value for a peak-to-peak ripple less than 0.5 V? What is the output DC voltage? Assume ideal diode.

Single phase transformer 10kVA, 2200/220v, 50Hz has the following
configure:
R1=4Ω, X1=5Ω, Rfe=25kω, XM=4kω, R2=0.04 Ω, X1=0.05 Ω
The transformer operates at rated voltage and feeds rated load
with a power factor of 0.8 inductive. To be identified:
1. The voltage fluctuation and the degree of efficiency.
2. The excitation current of the transformer.
3. The energy it consumes in a 24-hour period (in kWh) if it works under a load of 16
hours a day and the rest he works without load.