- #1

Syle1

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Hi, I've got a small physics problem : build an thermometer using the Wheatstone bridge, only knowing the voltage and the middle resistor of the bridge.

I need help for the resistors values ; I've finished the rest, which is the relation between temperature and the resistors and the voltage.

I don't know how the find proper resistor values.

Drew this : https://imgur.com/a/ESBuG

Kirchhoff equations, Ohms law. Don't think more is needed?

[/B]

Solved my initial problem (thermometer) by arbitrarily choosing R1 R2 R3 = 100 ohms, but it just seems so silly. I need to prove one way or another resistors values, or prove that I can arbitrarily choose them. (and which resistor range?)

Saw videos about solving the bridge knowing all the resistors, which I can do, but here we don't have them. So I have no idea ahah.Thanks a lot if you can help me through this, I'll owe you one !

Syle

I need help for the resistors values ; I've finished the rest, which is the relation between temperature and the resistors and the voltage.

I don't know how the find proper resistor values.

1. Homework Statement1. Homework Statement

Drew this : https://imgur.com/a/ESBuG

## Homework Equations

Kirchhoff equations, Ohms law. Don't think more is needed?

## The Attempt at a Solution

[/B]

Solved my initial problem (thermometer) by arbitrarily choosing R1 R2 R3 = 100 ohms, but it just seems so silly. I need to prove one way or another resistors values, or prove that I can arbitrarily choose them. (and which resistor range?)

Saw videos about solving the bridge knowing all the resistors, which I can do, but here we don't have them. So I have no idea ahah.Thanks a lot if you can help me through this, I'll owe you one !

Syle