03 // 双向 STEM 与金融计算器 // 物理力学、电磁学与热力学计算器V = I × R

欧姆定律电压、电流与电阻计算器

根据欧姆定律 V = I × R,在电路电压、电流强度与电阻阻值之间正反双向求解。

V = I × R
选择要计算的未知量(或直接在任意输入框中输入数值):当前求解: V — Voltage (Potential Difference)
计算结果

Electromotive potential across the load in Volts

0.11,000.00

Charge flow rate in Amperes

0.001100

Conductor or load resistance in Ohms

0.1100,000.00
计算结果 · Voltage (Potential Difference) (V)
12V
单位换算:

分步代入计算过程

01Canonical Law: V = I × R
02Given Inputs (Base Units): I = 0.5 A, R = 24 Ω
03Solve for V (Voltage (Potential Difference)): V = 12 V

Ohm's Law states that the electrostatic potential difference V across an ideal conductor is directly proportional to the current I flowing through it and its electrical resistance R: V = I × R.

常见参考标准值

USB-C PD Standard Rail5V / 9V / 15V / 20V

Up to 5A (100W) or 48V 5A (240W EPR)

Automotive DC Bus12.6V – 14.4V

Lead-acid / LiFePO4 starter & accessory rail

Logic CMOS Pull-Up10 kΩ @ 3.3V → 0.33 mA

Low quiescent digital bus termination

20 行数值对照表

Voltage (Potential Difference) (V) · Electric Current (I)

Ohm's Law Voltage, Current & Resistance Calculator — Electric Current → Voltage (Potential Difference)
#Electric Current (A)Voltage (Potential Difference) (V)Δ %
010.001 A0.024 V-99.80%
020.5 A当前12 V0.00%
031.5009 A36.0211 V+200.18%
042.2508 A54.0197 V+350.16%
053.0008 A72.0183 V+500.15%
063.7507 A90.0168 V+650.14%
074.5006 A108.0154 V+800.13%
085.2506 A126.0139 V+950.12%
096.0005 A144.0125 V+1100.10%
106.7505 A162.0111 V+1250.09%
117.5004 A180.0096 V+1400.08%
128.2503 A198.0082 V+1550.07%
139.0003 A216.0068 V+1700.06%
149.7502 A234.0053 V+1850.04%
1510.5002 A252.0039 V+2000.03%
1611.2501 A270.0024 V+2150.02%
1712 A288.001 V+2300.01%
1812.75 A305.9996 V+2450.00%
1913.4999 A323.9981 V+2599.98%
2014.2499 A341.9967 V+2749.97%
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常见问题解答 (FAQ)

如何使用在线 欧姆定律电压、电流与电阻计算器 工具?+

输入已知参数或拖动滑块,即可在浏览器中实时计算并可视化 欧姆定律电压、电流与电阻计算器(基于关系式 V = I × R)。根据欧姆定律 V = I × R,在电路电压、电流强度与电阻阻值之间正反双向求解。

可以导出或打印 欧姆定律电压、电流与电阻计算器 的结果吗?+

可以。支持一键复制数据、打印计算工作表或导出高清 SVG、PNG 和 CSV 文件。

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可以。点击工具顶部的“清空 / 空白开始”按钮即可重置所有输入项,随时也可一键重新加载示例数据。