Wheatstone Bridge Calculator
This calculator helps engineers and electronics enthusiasts determine the unknown resistance in a Wheatstone Bridge circuit, ensuring precision in measurement and circuit design.
Calculator
Results
The unknown resistance R4 is: -- Ω
Data Source and Methodology
All calculations are based on the fundamental formulas of electrical engineering. The Wheatstone Bridge calculation uses the ratio of known resistances to determine the unknown value. For more detailed theory, consult Wikipedia.
The Formula Explained
The primary formula for the Wheatstone Bridge is:
R4 = (R2 / R1) * R3
Glossary of Variables
- R1: Known resistance in the first leg of the bridge.
- R2: Known resistance in the second leg of the bridge.
- R3: Known resistance in the third leg of the bridge.
- R4: Unknown resistance calculated using the formula.
How It Works: A Step-by-Step Example
Suppose you have resistances R1 = 100 Ω, R2 = 150 Ω, and R3 = 200 Ω. Using the formula, the unknown resistance R4 would be calculated as (150/100) * 200 = 300 Ω.
Frequently Asked Questions (FAQ)
What is a Wheatstone Bridge?
A Wheatstone Bridge is a circuit used to precisely measure an unknown electrical resistance by balancing two legs of a bridge circuit.
How do you calculate the unknown resistance?
Using the formula R4 = (R2/R1) * R3, where R1, R2, and R3 are known resistances.
Why use a Wheatstone Bridge?
It provides a very accurate measurement of resistance, especially useful in sensor applications.
Can I use this calculator for other types of circuits?
This calculator is specifically designed for Wheatstone Bridge circuits.
Is the result from the calculator always precise?
The precision depends on the accuracy of the input resistances.