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Maximum power to a load 
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#1
Oct1909, 11:27 PM

P: 15

I'm doing some practice problems, and I can't seem to figure out where to even begin with this one.
I've tried solving for [tex]R_{T}[/tex] (Thevenin resistance) by removing the 9V source and adding a 1V test source across the load, and I've also tried solving for [tex]R{_T}[/tex] by leaving the 9V source in the circuit. If someone could walk me through the steps, I would greatly appreciate it! 


#2
Oct2009, 12:40 PM

Mentor
P: 40,652

What technique in calculus is used to maximize something? 


#3
Oct2009, 01:55 PM

P: 1,395

The tevenin resistance is (open circuit voltage)/(short circuit current) Finding these can IMO most easily be done by finding an equation for the potential of the point between the 3 resistances with KCL. 


#4
Nov509, 05:24 PM

P: 4

Maximum power to a load
To find Rth :
short out 9v voltage supply and open RL resistor the independent 3Vx source remains. Introduce voltage source Vth from RL terminal and Isc flowing into the 4ohm resistor from Vth using KVL with mesh currents both are clockwise, The below equation is derived : << complete solution deleted by berkeman >> 


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