A parallel-plate capacitor is to be designed, using a dielectric of dielectric constant 5, so as to have a dielectric strength of 10 9 Vm -1 . If the voltage rating of the capacitor is 12kV, the minimum area of each plate required to have a capacitance of 80 pF is :

1. A. 10.5 10 -6 m 2
2. B. 21.7 10 -6 m 2
3. C. 25.0 10 -5 m 2
4. D. 12.5 10 -5 m 2

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