{
  "schemaVersion": "1.0",
  "id": "https://elect-learn.org/zh/tools/ohms-law-calculator/",
  "url": "https://elect-learn.org/zh/tools/ohms-law-calculator/",
  "markdownUrl": "https://elect-learn.org/zh/tools/ohms-law-calculator/index.md",
  "jsonUrl": "https://elect-learn.org/zh/tools/ohms-law-calculator/index.json",
  "language": "zh",
  "title": "欧姆定律计算器",
  "description": "输入任意两个正数，计算理想直流电阻回路的电压、电流、电阻与功率。浏览器内免费计算，不保存输入；不用于选线、保护器件或施工判断。",
  "kind": "calculator",
  "safetyNotice": "学习参考：不同国家/地区的电气规范、许可和验收主体差异很大，本课程不替代当地法规、持证培训、现场许可或主管部门要求。任何实操前都应断电、验电，并遵守当地 AHJ/监管机构和雇主流程。",
  "sections": [
    {
      "id": "ohms-law-formulas",
      "heading": "欧姆定律计算器能求什么",
      "paragraphs": [
        "在理想直流电阻模型中，欧姆定律把电压、电流与电阻关联为 V = I × R，电功率关系为 P = V × I。输入任意两个正数，计算器会求出其余两个量。"
      ],
      "items": [
        "已知电压和电流：R = V ÷ I；P = V × I。",
        "已知电压和电阻：I = V ÷ R；P = V² ÷ R。",
        "已知电压和功率：I = P ÷ V；R = V² ÷ P。",
        "已知电流和电阻：V = I × R；P = I² × R。",
        "已知电流和功率：V = P ÷ I；R = P ÷ I²。",
        "已知电阻和功率：I = √(P ÷ R)；V = √(P × R)。"
      ]
    },
    {
      "id": "calculator-example",
      "heading": "示例：12 V 加在 6 Ω 电阻上",
      "paragraphs": [
        "输入电压 12 V、电阻 6 Ω。理想计算结果为电流 2 A、功率 24 W。结果只描述这个数学模型，不能据此选择真实器件，也不能证明回路安全。"
      ],
      "links": [
        {
          "title": "学习电压、电流、电阻与功率",
          "url": "https://elect-learn.org/zh/lesson/04-voltage-current-power/"
        },
        {
          "title": "练习串并联回路推理",
          "url": "https://elect-learn.org/zh/lesson/06-series-parallel-voltage-drop/"
        }
      ]
    },
    {
      "id": "calculator-scope",
      "heading": "适用范围与安全边界",
      "paragraphs": [
        "本页只用于正数条件下的理想直流电阻负载纸面练习。它不模拟交流相角、功率因数、电抗、电机启动、电压降、温度、导体载流量、敷设方式、故障电流、保护器件动作或当地规范。",
        "不得用本计算器选择线径、断路器、熔断器、设备额定值或授权电气作业。真实测量与带电作业需要合适的仪表、程序、授权以及针对任务的能力。"
      ]
    },
    {
      "id": "calculator-sources",
      "heading": "公式来源与编辑状态",
      "paragraphs": [
        "公式关系已于 2026 年 10 月 28 日对照美国政府资料核查。本页尚无独立专业审校；所列来源支持基础关系式，不支持针对具体现场的设计判断。"
      ],
      "links": [
        {
          "title": "NIST — Ampere: The Present",
          "url": "https://www.nist.gov/si-redefinition/ampere/ampere-present"
        },
        {
          "title": "US Department of Energy — Electrical Systems and Safety Oversight Guide",
          "url": "https://www.energy.gov/documents/qsr-electricalsafetysystemspdf"
        },
        {
          "title": "内容责任与审校状态",
          "url": "https://elect-learn.org/zh/methodology/"
        }
      ]
    }
  ],
  "dateModified": "2026-10-28",
  "datePublished": "2026-10-28",
  "publisher": {
    "name": "Elect Learn",
    "url": "https://elect-learn.org"
  },
  "review": {
    "status": "not-independently-reviewed",
    "statement": "尚无独立专业审校记录。参考来源不代表来源机构审校或认可本站。",
    "policyUrl": "https://elect-learn.org/zh/methodology/"
  }
}