The electric field strength 5 cm from a very long charged wire is 2000N/C . What is the field strength 10 cm from wire.(adsbygoogle = window.adsbygoogle || []).push({});

A)1x10^-4 N/C

B)1x10^3 N/C

C)9.9x10^7 N/C

D) None of these

I have

E=kq/r^2 and infinite line charge E=(2k[tex]\lambda[/tex])/R

2000 * .05 m^2 /K =q

q=5.56 E-8

k5.56E-8/.^21 m = 500 N/C so my answer would be D

But its wrong so where am I off? Thanks for the help

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

Dismiss Notice

Join Physics Forums Today!

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

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

# Homework Help: Electric field strength of wire problem

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