免费并联电阻计算器
计算并联电阻的等效阻值。
Ω
Ω
Total Resistance
66.6667 Ω
Total Resistance vs Resistor 1
公式
## Parallel Resistance Resistors in parallel share the same voltage, and the reciprocals of their resistances add. ### Formula **1/R_total = 1/R1 + 1/R2 + ...** For two resistors: **R_total = (R1 * R2) / (R1 + R2)** The total is always less than the smallest individual resistor.
计算示例
Two resistors in parallel: 100 Ω and 200 Ω.
- 011/R = 1/100 + 1/200 = 0.01 + 0.005 = 0.015
- 02R = 1 / 0.015 = 66.67 Ω
- 03Or: R = (100 * 200) / (100 + 200) = 20000 / 300 = 66.67 Ω
常见问题
Why is parallel resistance lower than either individual resistor?
Each parallel path provides an additional route for current to flow, reducing the overall opposition to current.
What if two equal resistors are in parallel?
The total resistance is exactly half of either one. For example, two 100 Ω resistors in parallel give 50 Ω.
How does this apply to household wiring?
Outlets in a house are wired in parallel so each receives the full supply voltage and can operate independently.
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