Making a fomula to calculate the max power (electricity)

AI Thread Summary
The discussion focuses on deriving a mathematical formula for maximum power in electrical circuits using existing equations. The user references key formulas, including U = R*I and Up = -ri*I + U0, and attempts to express power as P = I·(-ri·I + U0). There is a request for additional context regarding the specific circuit involved, suggesting that a circuit diagram would aid in understanding the problem better. The conversation emphasizes the need for clarity in circuit analysis to effectively calculate maximum power.
Tqooa Ez

Homework Statement


Show how you can make a mathematic formula for maximum power, by using the other formulas.
I think, that U is maybe called V in English.

Homework Equations



U= R*I
Up = -ri *I+U0

The Attempt at a Solution


[/B]
P=I·(-ri·I+U0)P= -ri·I2+U0 I


 
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Hi Tqooa Ez,

Welcome to Physics Forums!

Tqooa Ez said:

Homework Statement


Show how you can make a mathematic formula for maximum power, by using the other formulas.
I think, that U is maybe called V in English.

Homework Equations



U= R*I
Up = -ri *I+U0

The Attempt at a Solution


[/B]
P=I·(-ri·I+U0)P= -ri·I2+U0 I

Can you give some more context to the problem? Is there a particular circuit involved? (I'm assuming that this is a circuit analysis problem given the names of the variables that you've mentioned). A circuit diagram would be welcomed.
 

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