1. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

2. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

3. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

4. Who invented Atomic numbers ?

Answer: Moseley of Britain in 1913

5. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

6. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

7. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879