[单选题]
A parallel-plate capacto0i:t7fee n /itor has plates of areuj+:6rb/8l wj7b a4(qq jl1f a hp-ohja $0.20 \; m^{2}$ separated by a distance of 1.0 mm. What is the strength of the electric field between these plates when this capacitor is connected to a 6.0-V battery?