This is the first part of the problem, which I solved.
Now to the second part which I can't manage to find the equations I need to use.
Problem:
This plant is connected to a 20/0.4 kV transformer of 250 kVA power, through an XP00-A cable (4x150 mm2, IN=300 A, Z1=0.26 Ω/km).
a) Calculate...
Alright, but how does that fit into the maximum power transfer theorem if RT=R=10Ω then gives me IA=3 A and with that IA I get Vab=40V?
Because the first time I solved for IA, I did it like R wasn't there at all, but since RT=R=10Ω, shouldn't I solve it using R in the equation as well?
So according to the "maximum power transfer theorem", R=RT=10Ω. Thank you.
From that, the equation for IA should be:
E1-IAR3+IR3-IAR-IR-IAR4=0
-20IA=-30-10-20
IA=3 A
and for Uab:
Uab=-IAR4+E1-IAR3+IR3=40 V
Now I can get IR=ET/RT+R=2 A and PR=I2*R=22*10=40 W. Hopefully I did everything right...
Homework Statement
In the circuit shown, in the image, the variable resistor R is consuming maximum power. Determine:
a) resistance for R
b) power for R
c) current for R3 and its direction
Homework EquationsThe Attempt at a Solution
I tried getting IA(the direction is shown with arrows in...
Hi. I am practising for my test and since I don't have the correct answers, I don't know if what I'm doing is right.
I tried to solve this problem, can you check it and correct if it's wrong?
Here's a clearer picture of the circuit.
I suspect Uab isn't right, but am not sure. Thanks...