Chapter 31 Faraday’s Law Induced Fields



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Motional emf, cont.

  • Under the influence of the force, the electrons move to the lower end of the conductor and accumulate there.
  • As a result of the charge separation, an electric field is produced inside the conductor.
  • The charges accumulate at both ends of the conductor until they are in equilibrium with regard to the electric and magnetic forces.
  • For equilibrium, qE = qvB or E = vB.
  • The electric field is related to the potential difference across the ends of the conductor: ΔV = E ℓ =B ℓ v.
  • A potential difference is maintained between the ends of the conductor as long as the conductor continues to move through the uniform magnetic field.
  • If the direction of the motion is reversed, the polarity of the potential difference is also reversed.
  • Section 31.2

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