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Fluorescent Lighting MCQs App & e-Book Download - 149

MCQ: 149

In which one of the following year, mercury vapor lamp was invented?

  1. 1823
  2. 1899
  3. 1912
  4. 1901

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Fluorescent Lighting App (Android & iOS)

Fluorescent Lighting App (Android & iOS)

General Knowledge App (Android & iOS)

General Knowledge App (iOS & Android)

Microelectronics App (Android & iOS)

Microelectronics App (Android & iOS)

C++ App (Android & iOS)

C++ App (iOS & Android)