The electric field at a distance of 10 cm from an isolated point charge of 2 x 10^-9 C is:(adsbygoogle = window.adsbygoogle || []).push({});

A)1.8 N/C

B)180 N/C

C)18 N/C

D) 1800 N/C

E)none of these

This is the formula I used Q=rv/k

so (2x10^-9 C)(9x10^9 Nm^2) / .1 m C^2

I am getting 180 N m/C - I have an extra m in the equation, which would make it none of the about. Evidently I am doing something wrong.

Thanks

Nautica

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Still confused about this one

**Physics Forums | Science Articles, Homework Help, Discussion**