A conducting loop is placed in a magnetic field. What must be true for there to be a current induced in the loop? (1 point) There must be a

Question

A conducting loop is placed in a magnetic field. What must be true for there to be a current induced in the loop? (1 point) There must be a source of charge The magnetic field must be changing Potential energy must change into kinetic energy The loop must be surrounded by insulating material

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Thạch Thảo 4 years 2021-08-21T15:28:51+00:00 1 Answers 20 views 0

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  1. Delwyn
    0
    2021-08-21T15:30:13+00:00
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    Answer:

    EMF will induce in the conducting loop when

    The magnetic field must be changing

    Explanation:

    As per Farady’s law of EMI we know that the magnetic flux linked with the closed conducting loop must be changed with time

    so we have

    EMF = \frac{d\phi}{dt}

    so we know that

    \phi = BAcos\omega t

    now if magnetic field is changing with time then we have

    EMF = Acos\theta \frac{dB}{dt}

    so EMF will induce when magnetic field will change with time

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