A ring of charge with radius m has m gap

PHYSICS · Single correct · AP · Physics C: Electricity and Magnetism · Electric Charges Fields and Gauss's Law · Electric Charges Fields and Gauss's Law

Problem

A ring of charge with radius 0.50.5 m has 0.002π0.002\pi m gap. If the ring carries a charge of +1+1 C, the electric field at the center is (1) 7.5×107 NC−17.5 \times 10^7 \text{ NC}^{-1} (2) 7.2×107 NC−17.2 \times 10^7 \text{ NC}^{-1} (3) 6.2×107 NC−16.2 \times 10^7 \text{ NC}^{-1} (4) 6.5×107 NC−16.5 \times 10^7 \text{ NC}^{-1}

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