这个工具适合做什么
Use it to calculate voltage from current and resistance, then check the associated electrical power.
- Choose a resistor rating.
- Check a simple DC circuit.
- Estimate power draw.
欧姆定律计算器
已知两个电学量时求解电压、电流或电阻。
物理电学电子物理
欧姆定律计算器公式
V = I × R输入已知数值后，计算器会使用该公式给出主要结果，并提供辅助指标帮助你检查结果是否合理。
| Symbol | Variable | Description |
|---|---|---|
| current | Current | Current, entered in A. |
| resistance | Resistance | Resistance, entered in Ω. |
如何使用欧姆定律计算器
- 1
输入已知数值
按字段填写数值，并确认单位与页面公式一致。
- 2
点击计算
主结果会显示在高亮行中，相关辅助结果会显示在下方。
- 3
解读结果
Voltage is the pressure across the resistance. Power helps you see whether a resistor or component rating is likely to be exceeded.
如何解读结果
Voltage is the pressure across the resistance. Power helps you see whether a resistor or component rating is likely to be exceeded.
使用前请确认
Use amperes and ohms for a voltage result in volts.