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In the given arrangement, the loop is mo...

In the given arrangement, the loop is moved with consisant velocity in uniform magnetic field B in a restricted a region of width a. The time for which the emf is induced in the cirucit is

A

`(2b)/(v)`

B

`(2a)/(v)`

C

`(a+b)/(v)`

D

`(2(b-a))/(v)`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • An emf induced in a coil rotating in a uniform magnetic field is given by

    A
    `e=e_(0)sin omegat`
    B
    `e_(0)=esinomegat`
    C
    `e=sinomegat`
    D
    `e=e_(0)sin omega`

  • A metal rod of length I is moved with velocity v in a uniform magnetic field vec B . Emf is induced between the two ends of rod

    A
    when `vec l` is parallel to `vec B`
    B
    when `vec l` is parallel to `vec v`
    C
    when `vec v` is parallel to `vec B`
    D
    none of the above cases

  • A conductor PQ , with PQ=r , moves with a velocity v in a uniform magnetic field of induced B . The emf induced in the rod is

    A
    `(vec(v)xxvec(B)).vec(r)`
    B
    `vec(v).(vec(r)xxvec(B))`
    C
    `vec(B).(vec(r)xxvec(v))`
    D
    `|vec(r)xx(vec(v)xxvec(B))|`
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