1. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

2. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

3. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

4. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

5. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

6. Who invented Computer ?

Answer:

Charles Babbage

7. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany