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14 January, 21:30

An infinite conducting cylindrical shell has radius 0.35 m and surface charge density 1.6 μC/m2. What is the magnitude of the electric field, in newtons per coulomb, 1.3 m from the axis of the cylinder?

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  1. 14 January, 21:58
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    The magnitude of the electric field is 8504 N/C

    Explanation:

    rc = 0.35 m, Ac = 2πr^2 = 2 x π x 0.35^2 = 0.769 m^2, σ = 1.6 μC/m2 = 0.0000016 μC/m2

    Surface Charge Density = total charge / surface area cylinder

    σ = q / A ⇒ q = σ · A

    q = 0.0000016 x 0.769

    q = 1.23 μC

    r = 1.3 m, k = 8.988 x 10^9

    electric field vector = Coulomb constant * charge : distance from charge

    E = k * q : r

    E = 8.988 x 10^9 x 1.23 x 10^ (-6) : 1.3

    E = 8504 N/C
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