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physics

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A wire loop has an area of 0.12 m2, and the magnetic field through it increases from 0 to 0.20 T in 0.30 s. What is the induced emf in the loop?

  • physics - ,

    ε = - dΦ/dt =- d(B•A•cosα)/dt.
    If cos α =±1, then
    ε =A•(Δ B/Δt) =
    = A•(B2 –B1)/ Δt =
    = 0.12•0.2/0.3 =0.08 V

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