Electro Magnetic Induction And Alternating Currents Question 467

Question: A conducting rod of mass m and is placed on a smooth horizontal surface in a region where transverse uniform magnetic field B exists in the region. At t=0, constant force .F starts acting on the rod at its mid-point as shown. Potential difference between ends of the rod, VpVQ at any time t is

Options:

A) BFt2m

B) BFt4m

C) 5BFt8m

D) 7BFt8m

Show Answer

Answer:

Correct Answer: A

Solution:

  • Velocity at any time t,

    v=a

    t=Fmt

    Now, e=VPVQ=Bv,sin,30o=B(Ftm)×12

    =BFt2m



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