It's not the potential energy. It's just the potential.
It's greatest at the positive terminal of the battery or power supply.
A) the sound waves were pushed closer together
The form of energy that can move from place to place across the universe is light energy. On earth, the main source of this energy is Sun. Most of the light energy comes from the sun because it is the primary source of all the energies. The food, fossil fuels, movement of winds, etc all exists due to Sun. Without sun, there won't be any light energy on the earth. In all the processes which occur on earth has a direct or indirect involvement of light energy which comes from sun.
Power is the energy transferred or "WORK DONE" in one second
