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Question: Answered & Verified by Expert
A uniform magnetic field exists in a region given by B=3i^+4j^+5k^ T. A rod of length 5 m is placed along the y-axis and it is moved along the x-axis with constant speed 1 m s-1. Then induced e.m.f. in the rod will be
PhysicsElectromagnetic InductionNEET
Options:
  • A zero
  • B 25 V
  • C 20 V
  • D 15 V
Solution:
1942 Upvotes Verified Answer
The correct answer is: 25 V
We know that

Magnetic field vector B=3i^+4j^+5k^

length of rod L=5j^

velocity vector v=1i^

Induced emf is given as

E=L.v×B

E=5j^1i^×3i^+ 4j^+5k^

E=5j^.-5j^+4k^

E=-25 V

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