1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

3. Who invented Submarine ?

Answer:

John Philip Holland

4. Who invented Hydrogen bomb ?

Answer:

Edward Teller

5. Who invented Laser ?

Answer:

Charles H. Townes

6. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

7. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832