Batteries and Fuel Cells

Question 1

Battery

Answer 1

A device that produces electricity using one or more Galvanic cells, where a chemical reaction between two electrodes generate an electric current.

Question 2

Primary cell

Answer 2

• Non-rechargeable batteries.
• Once the chemical reaction is
  complete, the battery cannot be recharged or reused.
• Example: Alkaline batteries (like in remote controls).

Question 3

Secondary Cells

Answer 3

• Rechargeable batteries.
• After use, they can be recharged by reversing the chemical reaction.
• Example: Lithium-ion batteries (used in smartphones and laptops)

Question 4

Dry Cell

Answer 4

• A type of primary cell where the electrolyte is in a paste form rather than liquid.
• It’s portable and used in everyday devices.
• Example: Zinc-carbon battery (like in flashlights).

Question 5

Lead-Acid Battery

Answer 5

• A type of rechargeable battery commonly used in cars.
• It uses lead and lead dioxide plates with sulfuric acid as the electrolyte.
• Known for it’s ability to provide a high surge of current.

Question 6

Fuel Cells

Answer 6

• Devices that generate electricity by converting the chemical energy of a fuel (like hydrogen) directly into electricity through a redox reaction.
• Fuel is continuously supplied, so they don’t run out as long as fuel is provided.

Example: Hydrogen fuel cells used in some electric vehicles.