# Wheatstone bridge - power dissipation

#### Santiago Aguilar

Joined Dec 16, 2016
2
Hi. I'm having a problem with this assignment. The ask me to calculate the values of R1, R2, R4, R5 so that the power dissipation in R3 is maximum.

I'll appreciate any help.

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#### dannyf

Joined Sep 13, 2015
2,197
The ask me to calculate the values of R1, R2, R4, R5 so that the power dissipation in R3 is maximum.
calculate the power dissipation of R3 as a function of R. Find out the value of R when the first order derivative of that power dissipation with respect to R is 0.

done.

#### Santiago Aguilar

Joined Dec 16, 2016
2
calculate the power dissipation of R3 as a function of R. Find out the value of R when the first order derivative of that power dissipation with respect to R is 0.

done.
I did the LTspice drawing wrong. R1, R2, R4 and R5 are not necessarily the same

#### WBahn

Joined Mar 31, 2012
26,398
If you are given a 5000 ohm resistor and a 10 V supply, what is the maximum amount of power that can be dissipated in it? How must the two be connected to make this happen. Can you figure out values of the four resistors in the schematic that would effectively result in this connection?