8) A flat circular loop having one turn and radius 5.0 cm is positioned with its plane perpendicular to a uniform 0.60-T magnetic field. The

Question

8) A flat circular loop having one turn and radius 5.0 cm is positioned with its plane perpendicular to a uniform 0.60-T magnetic field. The area of the loop is suddenly reduced to essentially zero in 0.50 ms. What emf is induced in the loop

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Minh Khuê 3 years 2021-08-24T03:57:34+00:00 1 Answers 63 views 0

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  1. thuthao
    0
    2021-08-24T03:59:25+00:00
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    Answer:

    EMF induced in the loop is 9.4 V

    Explanation:

    As we know that initial magnetic flux of the loop is given as

    \phi_1 = B.A

    \phi_1 = (0.60)(\pi (0.05)^2)

    \phi_1 = 4.7 \times 10^{-3} Wb

    As soon as the area of the loop becomes zero the final magnetic flux of the loop is ZERO

    Now as per faraday’s law of electromagnetic induction the EMF is induced due to rate of change in magnetic flux

    so we will have

    EMF = \frac{\Delta \phi}{\Delta t}

    so we will have

    EMF = \frac{4.7 \times 10^{-3} - 0}{0.50 \times 10^{-3}}

    EMF = 9.4 V

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