1. Who invented by Electric Lamp ?

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

2. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

3. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

4. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

5. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

6. Who invented Calculus ?

Answer: Newton of Britain in 1670.

7. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903