(Solved): A disk of radius a has a total charge Q uniformly distributed over What is the electric potential ...

A disk of radius $$a$$ has a total charge $$Q$$ uniformly distributed over What is the electric potential $$V(z)$$ on the $$z$$ axis as a function of $$z$$, for $$z>0$$ ? its surface. The disk has negligible thickness and lies in the $$xy$$ plane. Throughout this problem, you may use the Express your answer in terms of $$Q,z$$, and $$a$$. You may use $$k$$ instead of $$\frac{1}{4?{?}_0}$$. variable $$k$$ in place of $$\frac{1}{4?{?}_0}$$. X Incorrect; Try Again; 5 attempts remaining Figure Part B What is the magnitude $$E$$ of the electric field on the $$z$$ axis, as a function of $$z$$, for $$z>0$$ ? Express your answer in terms of some or all of the variables $$Q,z$$, and $$a$$. You may use $$k$$ instead of $$\frac{1}{4?{?}_0}$$.