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henpen

How does EM induction and the motor effect work?

  • one year ago
  • one year ago

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  1. henpen
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    (1) How is the Lorentz force law derived? (2) For the motor effect, is a fair explanation that the moving electrons experience a force downwards due to a magnetic force, and push the wire down with them due to EM repulsion between them and the metal atoms? (3) For EM induction, why is there a dB/dt term if there is not in the Lorentz force law? I am confused intuitively about it; I understand what happens, but not why above the level of rote.

    • one year ago
  2. masumanwar
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    induced emf was first suggested by Michel Faraday and by applying circuit for close loop using inductor and applying dc or ac voltage we can measure induced emf

    • one year ago
  3. shamim
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    lorentz force law is \[F=qE+q(v \times B)\]

    • one year ago
  4. shamim
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    here q= charge F=force and its a vector E=electric field and its a vector v=velocity of charge q and its a vector B= magnetic field and its vector

    • one year ago
  5. shamim
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    if in any place both electric field E and magnetic field B present then this lorentz force law will b applied

    • one year ago
  6. shamim
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    Lorentz force law can b writen as\[F=q(E+v \times B)\]

    • one year ago
  7. shamim
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    ur question 2 is not clear to me

    • one year ago
  8. shamim
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    now i wanna talk abt ur question 3

    • one year ago
  9. henpen
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    That's not the derivation, it's just a statement of the law.

    • one year ago
  10. shamim
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    ya

    • one year ago
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