1. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

2. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

3. Who invented Piano ?

Answer:

Bartolomeo Cristofori

4. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

5. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

6. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

7. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin