Lead Acid Battery Concepts

The video tutorial discusses the working principle of lead acid batteries, commonly used as storage or secondary batteries. It covers the materials used, such as lead peroxide, sponge lead, and dilute sulfuric acid. The discharging process involves the flow of electrons between plates, creating a current. The charging process reverses this flow using an external DC source, restoring the battery's ability to discharge.

What are the main active materials used in constructing a lead acid battery?

• Copper, zinc, and hydrochloric acid

• Lead peroxide, sponge lead, and dilute sulfuric acid

• Lithium, cobalt oxide, and graphite

• Nickel, cadmium, and potassium hydroxide

What is the composition of the positive plate in a lead acid battery?

• Zinc sulfate, a white crystalline solid

• Copper oxide, a greenish compound

• Lead peroxide, a dark brown hard substance

• Pure lead in soft sponge condition

What is the ratio of water to acid in the dilute sulfuric acid used in lead acid batteries?

• 4:1

• 1:1

• 2:1

• 3:1

During the discharging process, what happens to the hydrogen ions at the lead peroxide plate?

• They form hydrogen gas and escape

• They remain unchanged

• They become hydrogen atoms and form lead oxide and water

• They react with zinc to form zinc sulfate

What happens to the density of sulfuric acid during the discharging of a lead acid battery?

• It increases

• It decreases

• It remains constant

• It becomes zero

What is the main purpose of connecting a load externally between the plates of a lead acid battery?

• To increase the battery's voltage

• To initiate the charging process

• To decrease the battery's resistance

• To balance the inequality of electrons

What is the role of the external DC source during the charging process of a lead acid battery?

• It increases the density of sulfuric acid

• It converts lead sulfate back to lead peroxide and lead

• It removes electrons from the lead plate

• It provides electrons to the lead peroxide plate

Which ions move towards the electrode connected with the negative terminal of the DC source during charging?

• Negative sulfate ions

• Positive lead ions

• Positive hydrogen ions

• Negative oxygen ions

What is formed when hydrogen atoms attack lead sulfate during the charging process?

• Sulfur dioxide and lead

• Lead and sulfuric acid

• Lead oxide and water

• Hydrogen gas and lead

What is the result of the charging process on the lead acid battery?

• The battery loses its charge

• The battery becomes unusable

• The battery becomes overcharged

• The battery becomes ready for discharging