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When the conductor is moved with its length parallel to the lines of magnetic field:

Correct answer: D. None of these

  • A. emf passes through the conductor
  • B. emf is induced across its ends
  • C. Both (a) and (b)
  • D. None of these

Explanation

When a conductor is moved parallel to the lines of magnetic field, neither emf passes through the conductor nor is it induced across its ends. Here's why:Magnetic flux remains constant: For emf induction to occur, there needs to be a change in the magnetic flux through the conductor. When the conductor moves parallel to the field lines, the area vector of the conductor remains perpendicular to the field lines, and the magnetic flux through the conductor remains constant. Therefore, no emf is induced.No Lorentz force: Additionally, when the conductor moves parallel to the field, the direction of its motion and the magnetic field are parallel, resulting in no Lorentz force acting on the charged particles within the conductor. Since Lorentz force is responsible for deflecting charged particles and inducing current, its absence implies no induced current or emf.Therefore, the correct answer is None of these.

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About Electromagnetic Induction

Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.

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