A Uniform Circular Ring Has Charge Q = 7 $\mu$ C,and Radius R = 3

Multiple Choice

A uniform circular ring has charge Q = 7.36 $\mu$ C,and radius r = 3.33 cm.Calculate the magnitude of the electric field at a distance of 4.20 cm along the axis of the ring.

A) 1.81 $\times$ 10¹ N/C
B) 6.52 N/C
C) 1.44 $\times$ 10⁷ N/C
D) 1.44 $\times$ 10¹ N/C
E) 1.81 $\times$ 10⁷ N/C