Dielectrics: an Air-Filled Parallel-Plate Capacitor Is Connected to a Battery

question 31

Multiple Choice

Dielectrics: An air-filled parallel-plate capacitor is connected to a battery and allowed to charge up. Now a slab of dielectric material is placed between the plates of the capacitor while the capacitor is still connected to the battery. After this is done, we find that

• A) the energy stored in the capacitor had decreased.
• B) the voltage across the capacitor had increased.
• C) the charge on the capacitor had increased.
• D) the charge on the capacitor had not changed.
• E) None of these choices is true.

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