MAXIMUM POWER TRANSFER
For every choice of R_L we have a different power.
How do we find the maximum value?
Consider P_L as a function of R_L and find the
maximum of such function
3
Set the derivative to zero to find extreme points.
For this case we need to set to zero the numerator
The maximum
power transfer
theorem
The load that maximizes the power transfer for a circuit is
equal to the Thevenin equivalent resistance of the circuit.
Technically we need
to verify that it is
indeed a maximum
The value of the maximum
power that can be
transferred is
ONLY IN THIS CASE WE NEED TO COMPUTE THE THEVENIN VOLTAGE
