Calculadora de Ponte de Wheatstone
Calcule a resistência desconhecida em um circuito de ponte de Wheatstone equilibrada.
V
Ω
Ω
Ω
Ω
Bridge Voltage
0.0000 V
Ratio R1/R31.0000
Ratio R2/R41.0000
Bridge Voltage vs Supply Voltage
Formula
## Wheatstone Bridge Analysis A Wheatstone bridge measures unknown resistance by balancing two divider legs. ### Formula **V_bridge = V_s x [R3/(R1+R3) - R4/(R2+R4)]** Balanced when **R1/R3 = R2/R4** (bridge voltage = 0).
Exemplo Resolvido
10 V supply, R1=R3=1k, R2=R4=2k.
- 01Left: R3/(R1+R3) = 1000/2000 = 0.5
- 02Right: R4/(R2+R4) = 2000/4000 = 0.5
- 03V_bridge = 10 x (0.5 - 0.5) = 0 V (balanced)
Perguntas Frequentes
What does balanced mean?
Bridge voltage is zero and no current flows through the galvanometer.
What is it used for?
Precision resistance measurement, strain gauges, load cells, and temperature sensors.
Can bridge voltage be negative?
Yes, indicating reversed polarity compared to the assumed direction.
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