Department of Physics PHYS 245 : Electromagnetism I Problem Set 2 Please hand in your solutions in class on Monday, 24" September, 2018 1. Calculate the electric field for the following configurations: (a) At a distance = above the centre of a ring of radius a (Fig. 1), if the ring carries a constant linear charge density. A. Figure 1: (b) At a distance = above the centre of a disk of charge carrying a uniform surface charge density. o. 2. A hollow spherical shell (Figure 2) carries charge density p = $ in the region a Sr Sb. Find the electric field in the regions (i) r b. Figure 2