1. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

2. Who invented Helicopter ?

Answer:

Igor Sikorsky

3. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

4. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.

5. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

6. Who invented Floppy disk ?

Answer: IBM in 1970

7. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm