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An equipotential surface that surrounds a point charge q has a potential of 590 V and an area of 1.20 m2. Determine q.

  • physics -

    A= 4πr² =>
    r=sqrt(A/4π )= sqrt(1.2/4•3.14)= 0.31 m

    φ=q/4πε₀r =>
    q= 4πε₀rφ=
    =4π•8.85•10⁻¹²•0.31•590=2.03•10⁻⁸ C

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