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Twinflower
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Homework Statement
This is the network.
The problem states that a new resistor is put between A and B, in parallel with R4.
I should find the ideal resistance for this load resistor and show that this is indeed the ideal resistance for maximum power output.
Homework Equations
[tex]R_th = R_L-max[/tex]
[tex]P=\frac{E_(th)^2}{4 \times R_th}[/tex]
The Attempt at a Solution
I have determined the Thévenin resistance and voltage in an earlier problem and found them to be:
Rth = 1.66 ohm
Eth = 8 Volts
I_R4 (before load resistor is connected) = 4 ampere
This is double checked with the solution.
I have also double checked that the load resistor should be 1.66 ohm to provide maximum power.
The power output is found using the P=formula stated above which gives me 9.36 W.
This is also correct according to the solution.
My problem is showing that with a lower or higher resistance, the power output will drop.
I can't simply put another resistance value into the formula above as the power will increase if I insert a lower resistance.
Can someone kick me a step in the right direction?