Which component is a single energy source in a circuit and can be combined with others to form a battery?

Which component is a single energy source in a circuit and can be combined with others to form a battery?

• A. Cell
• B. Capacitor
• C. Buzzer
• D. Conductor

Answer: (A)

In circuits, energy is provided by a source, and a cell is a single energy source that can be combined with other cells to form a battery. A cell converts chemical energy into electrical energy, and when you put two or more cells together—typically in series—you increase the total voltage to create a battery with more power. The other options aren’t energy sources: a capacitor stores energy but doesn’t generate it, a buzzer is a load that uses energy to produce sound, and a conductor only provides a path for current. So the cell is the basic unit that can stand alone or be joined with others to make a battery.

In circuits, energy is provided by a source, and a cell is a single energy source that can be combined with other cells to form a battery. A cell converts chemical energy into electrical energy, and when you put two or more cells together—typically in series—you increase the total voltage to create a battery with more power. The other options aren’t energy sources: a capacitor stores energy but doesn’t generate it, a buzzer is a load that uses energy to produce sound, and a conductor only provides a path for current. So the cell is the basic unit that can stand alone or be joined with others to make a battery.