欧姆定律计算器 — 公式
Ohm's Law
Ohm's law is the foundational relationship in circuit analysis, connecting voltage, current, and resistance.
Formula
V = I * R
where V is voltage in volts, I is current in amperes, and R is resistance in ohms. Power dissipated is P = I² * R.
计算示例
2 amperes flowing through a 10 ohm resistor.
- V = I * R
- V = 2 * 10
- V = 20 V
- P = I² * R = 4 * 10 = 40 W