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17 October, 20:13

Find the x-component of the electric field at the origin due to the full arc length for a charge of 4.5 µc and a radius of 0.55 m. the value of the coulomb constant is 8.98755 * 109 n · m 2 / c 2. answer in units of n/c

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  1. 17 October, 20:38
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    Charge Q = 4.5 µc

    Radius of the arc R = 0.55 m

    Coulomb constant ke = 8.98755 à - 10^9 n • m 2 / c 2

    Charge per unit arc length = delta q / delta theta = Q / (pi / 2) = 2Q / pi

    => Delta q = (2Q / pi) delta theta

    So the x-component after subtitling the delta q is

    E = 2 ke Q / pi R^2 = (2 x 8.98755 Ă - 10^9 x 4.5 x 10^-6) / 3.14 x (0.55) ^2

    E = 80.89 x 10^3 / 0.94985 = 85.15 x 10^3 = 85151 N/C
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