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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?