科学

欧姆定律计算器

使用欧姆定律计算电压、电流、电阻和功率

使用方法
  1. Select what you want to solve for: Voltage, Current, or Resistance.
  2. Enter the values for the other two variables.
  3. Click Calculate to compute the missing value and the total power in Watts.

公式

Ohm's Law formulas:

  • Voltage (V) = Current (I) × Resistance (R)
  • Current (I) = Voltage (V) ÷ Resistance (R)
  • Resistance (R) = Voltage (V) ÷ Current (I)

Power (P) = Voltage (V) × Current (I)