1. Who invented Transformer ?

Answer:

Ottó Bláthy

2. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.

3. Who invented by Electric Lamp ?

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

4. Who invented Floppy disk ?

Answer: IBM in 1970

5. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

6. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

7. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany