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Motional Electromotive Force...

Motional Electromotive Force

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Knowledge Check

  • Electromotive force is a:

    A
    potential
    B
    non-contact
    C
    P.D.
    D
    contact

  • Assertion : Electromotive force is a force which helps the electrons to flow and produce current. Reason : Electromotive force is independent of the voltage across the cell.

    A
    If both assertion and reason are true and reason is the correct explantion of assertion.
    B
    If both assertion and reason are true and reason is not the correct explantion of assertion.
    C
    If assertion is false but reason is true.
    D
    If assertion is true but reason is false.

  • In a p-n junction photo cell, the value of the of the photo electromotive force produced by monochromatic light is proportional to

    A
    the barrier voltage at the `p-n` junction
    B
    the intensity of the light falling on the cell
    C
    the frequency of the light falling on the cell
    D
    the voltage applied at the `p-n` junction

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