# Electric potential, infinite nonconductin sheet and particle

jegues

## Homework Statement

See figure below,

## The Attempt at a Solution

I'm not sure how to use the sigma factor in this question.

I know that,

$$W= Fd$$

So,

$$W = Eqd$$

but I dont know how to get any farther.

What am I missing? How do I take advantage of sigma to get what I want?

#### Attachments

• CH24-Q7.JPG
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