1. Who invented Piano ?

Answer:

Bartolomeo Cristofori

2. Who invented Television ?

Answer:

John Logie Baird

3. Who invented Laser ?

Answer:

Charles H. Townes

4. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

5. Who invented Floppy disk ?

Answer: IBM in 1970

6. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

7. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832