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physics

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An equipotential surface that surrounds a point charge q has a potential of 516 V and an area of 1.01 m2. Determine q

  • physics -

    A=4πr²
    => r=A/4π
    φ=kq/r

    k =9•10⁹ N•m²/C²
    φ=516 V,
    A= 1.01 m^2

    q= φr/k=φA/4πk=..

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