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    Physics-
    General
    Easy

    Question

    A square loop of side 5 blank c m enters a magnetic field with 1 blank c m s to the power of negative 1 end exponent. The front edge enters the magnetic field at t equals 0 then which graph best depicts e m f

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    The correct answer is:

      When loop is entering in the field, magnitude flux linked with the loop increases so induced emf in it e equals B v l equals 0.6 cross times 10 to the power of negative 2 end exponent cross times 5 cross times 10 to the power of negative 2 end exponent equals 3 cross times 10 to the power of negative 4 end exponent V (Negative).
      When loop completely enters in the field (after 5 blank s e c) flux linked with the loop remains constant, so e equals 0.
      After 15 blank s e c, loop begins to exist, linked magnetic flux decreases so induced emfe equals 3 cross times 10 to the power of negative 4 end exponent blank V (Positive)

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