A sphere of radius 10 cm is charged to a potential of 500V. Calculate the outward pull per unit area.

Ans: 1390 * 10^-8 N/m^2

I'm sure the calc is simple, but how do I calculate "outward pull" from voltage?

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  1. The pull per unit area is the E-field times the charge per unit area.

    For total charge Q,
    500 V = k Q/R
    Solve for Q and then for pull per area.

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  2. Thank you so much

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