# Problem: Charge is distributed uniformly along a long straight wire. The electric field 2 cm from the wire is 20 N/C. The electric field 4 cm from the wire is?

###### FREE Expert Solution

The electric field due to a uniformly charged wire is expressed as:

$\overline{){\mathbf{E}}{\mathbf{=}}\frac{\mathbf{\lambda }}{\mathbf{2}\mathbf{\pi }\mathbf{\epsilon }\mathbf{r}}}$

Here, λ is the charge per unit length, r is the distance of a point from the wire.

We're given that at r = 2 cm, E2 = 20 N/C

85% (84 ratings) ###### Problem Details

Charge is distributed uniformly along a long straight wire. The electric field 2 cm from the wire is 20 N/C. The electric field 4 cm from the wire is?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Electric Field concept. You can view video lessons to learn Electric Field. Or if you need more Electric Field practice, you can also practice Electric Field practice problems.