A parallel-plate air-filled capacitor has a capacitance of \( 50 \mathrm{pF} \). (a) If each of ...

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A parallel-plate air-filled capacitor has a capacitance of \( 50 \mathrm{pF} \). (a) If each of its plates has an area of \( 0.30 \mathrm{~m}^{2} \), what is the separation? (b) If the region between the plates is now filled with material having \( \kappa=5.6 \), what is the capacitance?
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