1. Who invented Transistor ?

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

2. Who invented Piano ?

Answer:

Bartolomeo Cristofori

3. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

4. Who invented Nylon ?

Answer:

Wallace Carothers

5. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

6. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

7. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932