Current Events of india

ssc preparation, important competetion questions, current affairs of india, latest question asked in competetion papers, 21. Who invented Electron ? Thomson. J of Britain in 1897  Comment on this question 22. Who invented Floppy disk ? IBM in 1970  Comment on this question 23. Who invented Neutron ? JAMES CHADWICK in 1932  Comment on this question 24. Who invented Refrigerator ? Oliver Evans in 1805  Comment on this question 25. Who invented Safety Pin ? Walter Hunt of U.S.A. in 1849  Comment on this question 26. Who invented Safety razor ? King Camp Gillette of U.S.A. in 1903  Comment on this question 27. Who invented Stainless Steel ? Harry Brearley of Britain in 1913.  Comment on this question 28. Who invented Steam Engine ? Thomas Savery of Britain in 1698  Comment on this question 29. W...

ssc preparation, important competetion questions, current affairs of india, latest question asked in competetion papers, GK Questions - Important Inventions 1. Who invented Aeroplane Orville & Wilbur Wright in 1903  Comment on this question 2. Who invented Air Conditioning ? Willis Carrier in 1902  Comment on this question 3. Who invented Barometer ? Evangelista Torricelli of Italy in 1644  Comment on this question 4. Who invented Ball-Point Pen ? John J. Loud of U.S.A. in 1888  Comment on this question 5. Who invented DNA Structure ? Crick(UK), Waston(US), Wilkins(UK) in 1951  Comment on this question 6. Who invented Laser ? Charles H. Townes  Comment on this question 7. Who invented Locomotive ? George Stephenson was first to buit steam locomotives.  Comment on this question 8. Who invented Logarithms ?...