Recent content by bobh.stein

Is the maximum z position just the amswer that i obtained in part a?

Thank you for your help, so to find the maximum electric force do i take my value for E(z) from part a because that is the maximum and then i have to come up with a maximum value for Q. I'm not sure exactly sure how to go about doing this.

So you do the derivative in terms of z and then solve that equal to zero for part a and then put it back into the original equation. For part B I'm guessing the electric force which is given by F=EQ has to be equal to the weight which is MG. Then i would rearrange so that it is M=EQ/G and...

For 1 do you do the derivative of the function? and for part b is the charge the same as the gravitational force?

Homework Statement Consider a very thin conducting ring of radius R which contains a total positive charge of +Q coulombs. (a) Derive a formula for the z coordinate which gives the maximum value for the magnitude of E ring (Z)? (b) Suppose that the charged ring is oriented horizontally, as...