A line of positive continuous charge is formed into a semicircle of radius R = 68 cm depicted below. The total charge of this semicircle Q = 10 μC. This charge, however, is distributed not uniformly along the semicircle but with the angle-dependent linear charge density λ(θ) = λ0cosθ. What is the value of parameter λ0? λ0 = μC/cm. Find now the electric field at the central point P in terms of its Ex and Ey components (with respect to the axes shown in the figure). Ex = N/C Ey = N/C