Question

An electric field measured near a point charge of 3.00×10−6 C has a strength of 1.50×105 N/C. How far is the point from the source charge?

0.30 m

0.42 m

0.36 m

0.095 m

Answer 1

i think its 0.36 ?

Answer 2

Did you use the formula \(E=k\frac{Q}{r^2}\)?

Answer 3

i did ,but i went to do it again and actually got 0.42

Answer 4

Okay I'll do it.

BTW, a big trap in electric field questions are units, because typically problems like to mess around. So be careful with your units :)

Answer 5

like this right?

Answer 6

yes could you double check yourself, thank you (: i may have made an error

Answer 7

I get .42 as well

Answer 8

Awesome ! thanks !