About electric energy, capacitors, and dielectrics. Select the always true state

Question

About electric energy, capacitors, and dielectrics. Select the always true statements from the following list

Equipotential surface -There is no no net electrostatic force on charges placed along this surface.

Parallel plate capacitor -The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates must decrease.

Electron -volt unit of electric power.

Electric potential -Two identical aluminum objects are insulated from their surroundings. If object A has a net positive charge and object B is grounded, then object B is at a lower potential.

Dielectric materials -A reasons for adding a dielectric material between the conducting plates of a capacitor are (1) Dielectrics do not break down (allowing electric charge to flow) as readily as air, so a higher voltage can be applied without charge passing across the gap.

Explanation / Answer

Equipotential surface -There is no no net electrostatic force on charges placed along this surface.

Electric potential -Two identical aluminum objects are insulated from their surroundings. If object A has a net positive charge and object B is grounded, then object B is at a lower potential.

Dielectric materials -A reasons for adding a dielectric material between the conducting plates of a capacitor are (1) Dielectrics do not break down (allowing electric charge to flow) as readily as air, so a higher voltage can be applied without charge passing across the gap.

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