v PartA A disk of radius a has a total charge Q uniformly distributed over its surface. The disk has negligible thickness and lies in the xy plane. (gure 1) Throughout this problem, you may What is the electric polenlial V (2) on the zaxis as a funciion of z, for z > 0'? , r 1 use the variable '6 I" place 0' 4\"" - Express your answer in terms of Q, 2, and a. You may use k instead of 47"60 . b View Available Hint(s) A24) O-? Figure 1 of 1 7 part B Nexl Figure ' What is the magnitude E of the electric field on the z axis, as a function of z, for z > 0? 1. Express your answer in terms of some or all of the variables Q, 2, and a. You may use 1:: instead at i . D View Available Hint(s) 3. x ' i ()