Question: A vacuum-insulated parallel-plate capacitor with plate separation d has capacitance C 0 . What is the capacitance if an insulator with dielectric constant k and

A vacuum-insulated parallel-plate capacitor with plate separation d has capacitance C₀. What is the capacitance if an insulator with dielectric constant k and thickness d/2 is slipped between the electrodes without changing the plate separation?

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