SOURCE OF ELECTRICITY 

Sources of Electric Current

1. Batteries:

• Batteries provide Direct Current (DC).
  
  

• A chemical reaction inside the battery generates a flow of electrons, creating an electric current.
  
  

• Examples: AA batteries, car batteries, rechargeable lithium-ion batteries.
  
  

2. Power Plants:

• Large power plants generate Alternating Current (AC).
  
  

• Electricity from power plants is distributed to homes and industries through transmission lines.

What is a Dry Cell?

A dry cell is a type of battery that uses a paste electrolyte instead of a liquid. It is commonly used in flashlights, toys, and clocks.

Parts of a Dry Cell:

• Zinc container: Acts as the negative terminal.
  
  

• Carbon rod: The positive terminal.
  
  

• Electrolyte paste: Provides the necessary chemical reaction for electricity generation.
  
  

• Separator: Prevents internal short circuits.
  
  

What is a Circuit?

A circuit is a closed path through which electric current flows.

Analogy:

A circuit is like a race track. If the track is complete, cars (electricity) can move. If the track is broken, the cars stop.

Example:

When you turn on a light switch, you complete a circuit, allowing electricity to flow through the wires to the bulb.