- #1

hidemi

- 208

- 36

- Homework Statement
- A nonconducting sphere of radius 10 cm is charged uniformly with a density of 100 nC/m^3. What is the magnitude of the potential difference between the center and a point 4.0 cm away?

The answer is 3.0 V.

- Relevant Equations
- V = kQ / r

I can use integral as attached to obtain the answer.

However, I wonder why I can not use " V = KQ / r " the get the correct answer.

Thanks.

However, I wonder why I can not use " V = KQ / r " the get the correct answer.

Thanks.