Which Gaussian surfaces have an electric flux of +q/εo through them

[Curious314]

Which Gaussian surfaces have an electric flux of +q/εo through them?

I think is b
since in c, +q and -q cancel each other out, d is only -q

is that the right approach?

thanks!

 

[Infinitum]

Hi curious314! (Your user name reminds me of another PF member, Curious3141 )

Welcome to PF.

Your approach to the problem is correct.