phone

1. Alexander Graham Bell
Presented by: Kamalika
Class: 3rd A
Maharishi Senior Secondary School
AI Digital Fair 2025–2026

2. Who Was Alexander Graham Bell?
• Alexander Graham Bell was a famous inventor
best known for creating the first practical
telephone.

3. His Great Invention
• Bell invented the telephone in 1876. It
changed how people communicate across the
world.

4. Why He Invented the Telephone
• Bell wanted to help people send their voices
over long distances.

5. The First Telephone
• The earliest phone was wooden and looked
like a simple sound receiver.

6. How the First Phone Worked
• It changed sound waves into electrical signals
and sent them through wires.

7. Telephone Evolution
• After Bell’s invention, many improved versions
of telephones were created.

8. Rotary Phone Era
• Phones with round dials became widely used
in homes.

9. Push-Button Phones
• Later, phones with buttons replaced rotary
phones, making calling faster.

10. Mobile Phones
• Then mobile phones arrived, allowing people
to communicate without wires.

11. Modern Digital Smartphones
• Today’s smartphones combine calling with
cameras, apps, and the internet.