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Consider a solid conducting ball of radius r=20·cm which starts out electrically neutral. Suppose 7·μC of...

Consider a solid conducting ball of radius r=20·cm which starts out electrically neutral. Suppose 7·μC of negative charge is added to the ball and it is allowed to reach electrostatic equilibrium.

(a) What is the surface charge density on the ball?  C/m2

(b) What is the electric field 10·cm from the center of the ball?  V/m   - direction

(c) What is the electric field at the surface of the ball?  V/m   - direction

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