Consider a parallel-plate capacitor originally with a charge \( q_{0} \), capacitance \( C_{0} \...

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Consider a parallel-plate capacitor originally with a charge \( q_{0} \), capacitance \( C_{0} \), and potential difference \( \Delta V_{0} \). There is an electrostatic force of magnitude \( F_{0} \) between the plates, and the capacitor has a stored energy \( U_{0} \). The terminals of the capacitor are connected to another capacitor of same capacitance and charge.

A dielectric slab with \( \kappa_{\mathrm{e}}1 \) is inserted between the plates of the first capacitor. Which quantity decreases?
(A) \( q \)
(B) \( C \)
(C) \( \Delta V \)
(D) \( F \)
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