1. Who invented Transformer ?

Answer:

Ottó Bláthy

2. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

3. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

4. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

5. Who invented Helicopter ?

Answer:

Igor Sikorsky

6. Who invented Atomic Bomb ?

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

7. Who invented by Electric Lamp ?

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