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6 December, 07:38

The charge density of a uniformly charged disk 0.420 m in diameter is 2.92 ✕ 10-2 C/m2. What is the magnitude of the electric field along the disk's axis at the following distances from its center?

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  1. 6 December, 07:44
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    E = { (Charge Density/2e0) * (1 - [z / (sqrt (z^2 - R^2)) ]}

    R is radius = Diameter/2 = 0.210m.

    At z = 0.2m,

    Put z = 0.2m, and charge density = 2.92 x 10^-2C/m2, and constant value e0 in the equation,

    E can be calculated at distance 0.2m away from the centre of the disk.

    Put z = 0.3m and all other values in the equation,

    E can be calculated at distance 0.3m away from the centre of the disk
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