1. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

2. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

3. Who invented Automatic rifle ?

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

4. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

5. Who invented Computer ?

Answer:

Charles Babbage

6. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

7. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683