戴维宁等效电路计算器
计算复杂电路的戴维宁等效电压和电阻。
V
Ω
Ω
Ω
Ω
Bridge Voltage
0.0000 V
Ratio R1/R31.0000
Ratio R2/R41.0000
Bridge Voltage vs Supply Voltage
公式
## 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).
计算示例
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)
常见问题
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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