Which term describes a single energy source such as a battery, solar panel, or power supply?

Which term describes a single energy source such as a battery, solar panel, or power supply?

• A. Cell
• B. Battery
• C. Source
• D. Generator

Answer: (A)

The thing being tested is identifying the smallest energy-producing unit. A cell is the basic energy source—the single unit that generates electrical energy. A battery is several cells connected together to increase voltage or capacity, and a solar panel is made of many solar cells to produce more power. A power supply is a device that provides energy (often with regulation) and isn’t a single energy cell. So the best term for a single energy source among the examples is cell.

The thing being tested is identifying the smallest energy-producing unit. A cell is the basic energy source—the single unit that generates electrical energy. A battery is several cells connected together to increase voltage or capacity, and a solar panel is made of many solar cells to produce more power. A power supply is a device that provides energy (often with regulation) and isn’t a single energy cell. So the best term for a single energy source among the examples is cell.