Electro Magnetic Induction And Alternating Currents Question 470

Question: A conducting wire xy of length l and mass m is sliding without friction on vertical conduction rails ab and cd shown in Fig. A uniform magnetic field B exists perpendicular to the plane of the rails, x moves with a constant velocity of

Options:

A) mgRBl

B) mgRBl2

C) mgRB2l2

D) mgRB2l

Show Answer

Answer:

Correct Answer: C

Solution:

  • BI=mg or BBvR=mg

    or v=mgRB22



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