For a spherically symmetric volume of charge in a vacuum with a charge density that is given by Qer PV for 0 a find 72 the Electric field vector for r>a
a. (Q/€ 12) [In(b) - In(a) ] a,
b. ar 0 (-Qe */ for?) a ,
c. [Qaa/leo In(a) ) ][a2 + 2a +2) a,
d. (Qe / r?) [a + 1] ar (Qe /€r2) [a2 + 2a +2) a,
e. None of these