"Fleming's right-hand rule" meaning in English

{
  "etymology_text": "Named after British engineer John Ambrose Fleming, who invented it.",
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
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      "glosses": [
        "A mnemonic that uses the right hand to show the direction of induced current when a conductor moves in a magnetic field. The right hand is held with the thumb, first finger and second finger mutually perpendicular to each other; then the thumb represents the direction of motion of the conductor; the first finger represents the direction of the field; and the second finger represents the direction of the induced or generated current."
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          "magnetic field",
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          "perpendicular",
          "perpendicular"
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      ],
      "raw_glosses": [
        "(physics) A mnemonic that uses the right hand to show the direction of induced current when a conductor moves in a magnetic field. The right hand is held with the thumb, first finger and second finger mutually perpendicular to each other; then the thumb represents the direction of motion of the conductor; the first finger represents the direction of the field; and the second finger represents the direction of the induced or generated current."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "wikipedia": [
        "Fleming's right-hand rule"
      ]
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  "word": "Fleming's right-hand rule"
}

{
  "etymology_text": "Named after British engineer John Ambrose Fleming, who invented it.",
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  "lang_code": "en",
  "pos": "name",
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      "glosses": [
        "A mnemonic that uses the right hand to show the direction of induced current when a conductor moves in a magnetic field. The right hand is held with the thumb, first finger and second finger mutually perpendicular to each other; then the thumb represents the direction of motion of the conductor; the first finger represents the direction of the field; and the second finger represents the direction of the induced or generated current."
      ],
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        ],
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          "perpendicular",
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      "raw_glosses": [
        "(physics) A mnemonic that uses the right hand to show the direction of induced current when a conductor moves in a magnetic field. The right hand is held with the thumb, first finger and second finger mutually perpendicular to each other; then the thumb represents the direction of motion of the conductor; the first finger represents the direction of the field; and the second finger represents the direction of the induced or generated current."
      ],
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        "physical-sciences",
        "physics"
      ],
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      ]
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  "word": "Fleming's right-hand rule"
}