1) In figure 1, R is a circular ring of charge having line charge density it and radius 3cm. Find, in terms of it, the net electric field at point P which is 15cm away along the axis of the ring. _ R 3 cm _ P 2) Figure 2 shows two concentric rings of radii R and R' = 3R that lie on the same plane. Point N lies on the central z-axis, at distance D = 2R from the center of the rings. The smaller ring has uniformly distributed charge +0.. In terms of Q, what is the uniformli,r distributed charge on the larger ring if the net electric field at N is zero