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When a conductor connected to an electrical circuit moves in a magnetic field, the direction induced current depends upon
  • a)
    number of turns and length of the conductor
  • b)
    strength of the magnetic field
  • c)
    speed of movement of the conductor
  • d)
    direction of the magnetic field and direction of motion of the conductor
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
When a conductor connected to an electrical circuit moves in a magneti...
  • When a conductor moves in a magnetic field, an electromotive force (EMF) is induced in the conductor according to Faraday's law of electromagnetic induction. The direction of the induced current depends on the relative directions of the magnetic field and the motion of the conductor.
  • According to Lenz's law, the induced current flows in a direction that opposes the change in magnetic flux through the conductor. This means that the induced current creates a magnetic field that opposes the external magnetic field causing the induction. The direction of the induced current can be determined using the right-hand rule.

Where N = number of turns, dΦ = change in magnetic flux, and e = induced e.m.f.
The negative sign says that it opposes the change in magnetic flux which is explained by Lenz law.
  • If the magnetic field and the motion of the conductor are parallel (or antiparallel), no current is induced.
  • If the magnetic field and the motion of the conductor are perpendicular, the induced current flows in a direction perpendicular to both the magnetic field and the motion of the conductor, according to the right-hand rule.
  • So, the direction of the magnetic field and the direction of motion of the conductor are the primary factors determining the direction of the induced current.
  • The other options listed (number of turns and length of the conductor, strength of the magnetic field, and speed of movement of the conductor) may affect the magnitude of the induced current but do not determine its direction.
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When a conductor connected to an electrical circuit moves in a magnetic field, the direction induced current depends upona)number of turns and length of the conductorb)strength of the magnetic fieldc)speed of movement of the conductord)direction of the magnetic field and direction of motion of the conductorCorrect answer is option 'D'. Can you explain this answer?
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