There are two pieces of plastic, a full ring (like this: 0 ) and a half ring (like this: ( . They have the same radius and charge density. Which electric field at the center has the greater magnitude? Defend your answer.

Question

I want to say that the magnitudes are equal but I don't know if that's correct.

Answer 1

In the full ring, wouldn't the symettrical charge density cause the NET E to be zero? But in the half ring, the other half is missing....

Answer 2

So then the half ring would have the greater magnitude because the charge density does not cause the Net E to be zero?

Answer 3

absolutely correct.

Answer 4

Thank you