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The graph gives the magnitude B(t) of a ...

The graph gives the magnitude B(t) of a uniform magnetic field that exists throughout a conducting loop, with the direction of the field perpendicular to the plane of the loop. Rank the five regions of the graph according to the magnitude of the emf induced in the loop, greatest first.

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b, then d and e tie, and then a and c tie (zero)
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The figure shows three situations in which identical circular conducting loops are in uniform magnetic fields that are either increasing (Inc) or decreasing (Dec) in magnitude at identical rates. In each, the dashed line coincides with a diameter. Rank the situations according to the magnitude of the current induced in the loops, greatest first.

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Knowledge Check

  • The graph gives the magnitude B (t) of a uniform magnetic field that exists throughout a conducting loop, perpendicular to the plane of the loop. Rank the five regions of the graph according to the magnitude of the emf induced in the loop, greatest first

    A
    `b gt (d=e) lt (a=c)`
    B
    `b lt (d=e) gt (a=c)`
    C
    `b lt d lt e lt c lt a`
    D
    `b gt (a=c) gt (d=e)`

  • The graph gives the magnitude B(t) of a uniform magnetic field that exists throughout a conductig loop, perpendicular to the plane of the loop. Rank the five regions of the graph according to the magnitude fo the emf induced in the loop, greater first

    A
    `bgt(d=e)lt(a=c)`
    B
    `bgt(d=e)gt(a=c)`
    C
    `bltdlteltclta`
    D
    `bgt(a=c)gt(d=e)`

  • a conducting loop of radius R is precent in a uniform magnetic-field B perpendicular the plane of the ring. If radius R varies as a function of time 't', as R_(0)+t . The e.m.f induced in the loop is

    A
    `2pi(R_(0)+t)B` clockwise
    B
    `pi(R_(0)+t)B` clockwise
    C
    `2pi(R_(0)+t)B` anticlockwise
    D
    zero

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