Question

Can you help me to answer this two questions?

1. How does a capacitor store energy?
2. Could a capacitor work if its dielectric were empty and why would it be better or worse than other capacitors?

Answer 1

1) capacitors store energy in the form of electric field. When capacitors are subjected to a potential difference, it draws current until the potential reaches the voltage rating of the capacitor.

2) Yes a capacitor would work if the dielectric is empty if there is potential difference across it's plate.

If dielectric is not added , the electric field will be less . hence the capacitor will store less energy