Asked by Sean

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
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I'm sure the calc is simple, but how do I calculate "outward pull" from voltage?
Answered by drwls
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.
Answered by Sean
Thank you so much
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