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. Solar panel
• D. Power supply

Answer: (A)

A cell is the basic unit that provides energy. A battery is made up of multiple cells stacked together to increase voltage or capacity, so it isn’t a single energy source. A solar panel also consists of many solar cells connected to produce more power, not just one. A power supply is a device that outputs electrical energy and may be powered by other sources, but it isn’t defined by a single energy-producing unit. So the single-energy-source idea is described by a cell.

A cell is the basic unit that provides energy. A battery is made up of multiple cells stacked together to increase voltage or capacity, so it isn’t a single energy source. A solar panel also consists of many solar cells connected to produce more power, not just one. A power supply is a device that outputs electrical energy and may be powered by other sources, but it isn’t defined by a single energy-producing unit. So the single-energy-source idea is described by a cell.