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)
| # | Electric Current (A) | Voltage (Potential Difference) (V) | Δ % |
|---|---|---|---|
| 01 | 0.001 A | 0.024 V | -99.80% |
| 02 | 0.5 A当前 | 12 V | 0.00% |
| 03 | 1.5009 A | 36.0211 V | +200.18% |
| 04 | 2.2508 A | 54.0197 V | +350.16% |
| 05 | 3.0008 A | 72.0183 V | +500.15% |
| 06 | 3.7507 A | 90.0168 V | +650.14% |
| 07 | 4.5006 A | 108.0154 V | +800.13% |
| 08 | 5.2506 A | 126.0139 V | +950.12% |
| 09 | 6.0005 A | 144.0125 V | +1100.10% |
| 10 | 6.7505 A | 162.0111 V | +1250.09% |
| 11 | 7.5004 A | 180.0096 V | +1400.08% |
| 12 | 8.2503 A | 198.0082 V | +1550.07% |
| 13 | 9.0003 A | 216.0068 V | +1700.06% |
| 14 | 9.7502 A | 234.0053 V | +1850.04% |
| 15 | 10.5002 A | 252.0039 V | +2000.03% |
| 16 | 11.2501 A | 270.0024 V | +2150.02% |
| 17 | 12 A | 288.001 V | +2300.01% |
| 18 | 12.75 A | 305.9996 V | +2450.00% |
| 19 | 13.4999 A | 323.9981 V | +2599.98% |
| 20 | 14.2499 A | 341.9967 V | +2749.97% |
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常见问题解答 (FAQ)
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