A positive charge q is distributed uniformly around a quarter-°le of radius R that lies in the first quadrant, with the center of curvature at the origin. Find the magnitude of the electric field at the origin.
A. q/√2π² ε_ο R²
B. q/2π² ε_ο R²
C. √2q/π² ε_ο R²
D. 4q/π² ε_ο R²
E. 2q/π² ε_ο R²