Exploring Battery Technologies

What is a dry cell and how does it work?

• A dry cell is a solar-powered device that converts sunlight into electricity.

• A dry cell is an electrochemical cell that generates electricity through a chemical reaction using a paste electrolyte.

• A dry cell is a type of rechargeable battery that uses liquid electrolyte.

• A dry cell is an electrochemical cell that requires water to function.

What are the main components of a mercury cell?

• Positive electrode (mercury oxide), negative electrode (zinc), electrolyte (potassium hydroxide)

• Positive electrode (lead dioxide)

• Electrolyte (sodium chloride)

• Negative electrode (copper)

Explain the chemical reaction in a lead acid battery.

• The battery uses a reaction between copper and zinc to generate electricity.

• The chemical reaction in a lead-acid battery involves the conversion of lead dioxide and sponge lead into lead sulfate and water during discharge, and the reverse during charging.

• Lead sulfate is converted into lead dioxide and sponge lead during discharge.

• The reaction involves lithium and cobalt compounds.

What are the advantages of nickel cadmium batteries?

• Low cost and easy disposal

• High energy density and lightweight

• Long shelf life without maintenance

• Advantages of nickel cadmium batteries include high discharge rates, good temperature performance, long cycle life, deep discharge tolerance, low self-discharge rate, and quick recharge capability.

How does a fuel cell generate electricity?

• A fuel cell generates electricity through solar panels.

• A fuel cell generates electricity by converting chemical energy from hydrogen and oxygen into electrical energy through an electrochemical reaction.

• A fuel cell generates electricity by burning fossil fuels.

• A fuel cell generates electricity by using wind turbines.

What is the typical voltage output of a dry cell?

• 3 volts

• 1.2 volts

• 9 volts

• 1.5 volts

Describe the environmental concerns associated with mercury cells.

• Mercury cells are safe for the environment and do not cause any harm.

• Mercury cells improve soil quality and promote plant growth.

• Mercury cells can contaminate soil and water, harm wildlife, and pose health risks due to mercury toxicity.

• Mercury cells are used to purify water and enhance wildlife habitats.

What is the role of the electrolyte in a lead acid battery?

• The electrolyte is used to cool the battery during operation.

• The electrolyte allows ion flow and enables chemical reactions in the battery.

• The electrolyte acts as a physical barrier between the electrodes.

• The electrolyte stores energy in the battery.

What are the applications of fuel cells in modern technology?

• Fuel cells are used in transportation, stationary power generation, portable power, and renewable energy systems.

• Fuel cells are only used in space exploration.

• Fuel cells are primarily used in cooking appliances.

• Fuel cells are mainly found in traditional batteries.

What is the lifespan of a typical lead acid battery?

• 3 to 5 years

• 10 to 12 years

• 6 to 8 years

• 1 to 2 years