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Question: Answered & Verified by Expert
A conducting rod of length $l$ is falling with a constant velocity $v$ perpendicular to a uniform horizontal magnetic field $B$. The potential difference between its two ends will be
PhysicsElectromagnetic InductionJEE Main
Options:
  • A $2 B l v$
  • B $B l v$
  • C $\frac{1}{2} B l v$
  • D $B^2 l^2 v^2$
Solution:
2372 Upvotes Verified Answer
The correct answer is: $B l v$
If \(e\) is the induced emf, then according to Faraday's law \(e=-\frac{d \phi}{d t}=-\mathrm{Blv}\)
So, the potential difference between two ends of conducting rods will be \(B v l\).

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