A 20-cm-radius ball is uniformly charged to 76nC . Part A What is the ball\'s un

Question

A 20-cm-radius ball is uniformly charged to 76nC .

Part A

What is the ball's uniform charge density (C/m3)?

Express your answer using two significant figures.

Part B

How much charge is enclosed by spheres of radii 5, 10, and 20 cm?

Express your answers using two significant figures. Enter your answers numerically separated by commas.

Part C

What is the electric field strength at points 5, 10, and 20 cm from the center?

Express your answers using two significant figures. Enter your answers numerically separated by commas.

Explanation / Answer

It's a basic question to do with charge density, although there aren't really balls available that will let you "uniformly charge" them.

The basic idea is that for uniform charge density, there is some parameter ? which tells you how much charge is in any given volume by the formula Q = ?

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