Electric Charge Video Lessons

Concept

# Problem: The electric field 5.40 cm from a very long charged wire is (2100 N/C , toward the wire).What is the charge (in nC) on a 1.00-cm-long segment of the wire?

###### FREE Expert Solution

The electric field from a charged wire:

$\overline{){\mathbf{E}}{\mathbf{=}}{\mathbf{-}}\frac{\mathbf{2}\mathbf{k}\mathbf{\lambda }}{\mathbf{r}}}$

From the equation:

λ = - (Er/2k) = - (2100)(5.40 × 10-2)/(2)(9 × 109) = - 6.3 × 10-9 C/m

###### Problem Details

The electric field 5.40 cm from a very long charged wire is (2100 N/C , toward the wire).

What is the charge (in nC) on a 1.00-cm-long segment of the wire?