How do telephones work?
Telephones work by sending and receiving electrical signals which represent sounds. When we dial a number a signal passes to another telephone which makes it ring. When the telephone is picked up, a connection is made and people can talk to each other over the phone.
Related posts:
GK Question "The Shoes Were Invented By Whom?" general knowledge book English 2021 current affairs q...
General Knowledge
Hindi Moral Story "Apna Hath Jaganath”, "अपना हाथ जगनाथ” for Kids, Full length Educational Story for...
General Knowledge
When did the first aerial attack on shipping take place?
1st in the World
Do you know “Oldest Anglican church in India”.
General Knowledge
Who was the first military pilot to fly officially?
1st in the World
GK Question "What Are X-Rays?" general knowledge book English 2021 current affairs quiz and answers ...
General Knowledge
What is cardboard and how is it made? Complete General Knowledge Question and Answer for Class 6, 7,...
General Knowledge
GK Question "About The End of Ice Age?" general knowledge book English 2021 current affairs quiz and...
General Knowledge
What makes a waterfall? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 ...
General Knowledge
Why does alcohol make people drunk? Complete General Knowledge Question and Answer for Class 6, 7, 8...
General Knowledge
Who discovered heredity? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11...
General Knowledge
GK Question "Why is it, that, a Whale spout?" general knowledge book English 2021 current affairs qu...
General Knowledge
Who discovered blood circulation? Complete General Knowledge Question and Answer for Class 6, 7, 8, ...
General Knowledge
Why do some people become midgets? Complete General Knowledge Question and Answer for Class 6, 7, 8,...
General Knowledge
When were the first two 'Supersonic' airliner services scheduled?
1st in the World
GK Question "How Do We Make Chewing Gum?" general knowledge book English 2021 current affairs quiz a...
General Knowledge
How does a thermostat work? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10,...
General Knowledge
Do mermaids exist? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 1...
General Knowledge
What is cataract of the eye? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10...
General Knowledge
Could the Mayans read and write? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9...
General Knowledge
