Two uniform rods, each having length 2.0 m, are bent to form semi-circles. One rod consists of a charger per unit length of 1.5 nC/m and the other consists of a charge per unit length of -1.5 nC/m. The semi-circles are joined to form a circle. Determine the magnitude of the electric field at the center of the circle?
i) 42 N/C
ii) 84 N/C
iii) 34 N/c
iv) 68 N/C
v) 0