Electric Fields and point charges

[beachy6]

ya, E=3pC/ (8.854x10^-12)(4pi (.012^2))= 4.68x10^13 N/pC

 

[beachy6]

So How do i use this value to now find the charge on the inner surface?

 

[ehild]

ya, E=3pC/ (8.854x10^-12)(4pi (.012^2))= 4.68x10^13 N/pC

It is wrong. How did you get that number?

ehild

 

[beachy6]

O i got it, so it would be +3pC