Important Inventions and Discoveries in World » Exercise - 191. Who invented Electric Generator? (a) Sir Alexander Graham Bell (b) Michael Faraday (c) Alfred B. Nobel (d) Thomas Alva Edison
Important Inventions and Discoveries in World » Exercise - 190. Who invented Gramophone? (a) Michael Faraday (b) Fahrenheit (c) Sir Alexander Graham Bell (d) Thomas Alva Edison
Important Inventions and Discoveries in World » Exercise - 189. Who invented Bifocal Lens? (a) Alfred B. Nobel (b) Thomas Alva Edison (c) Benjamin Franklin (d) Rudolf Diesel