Question

How does inserting a dielectric between plates increase the capacitor’s stability?

• A. The attractive force on plates makes the capacitor unstable. Dielectric gives support for the plates.
• B. The dielectric gives more voltage capacity.
• C. The dielectrics have higher relative permittivity than air.
• D. None of these

Answer 1

The correct option is A The attractive force on plates makes the capacitor unstable. Dielectric gives support for the plates.

Obviously if there is a physical object providing a normal reaction to the plates, then the net force on the plates become zero and the capacitor become stable.