1. ഫിലമെന്റ് ലാമ്പ് ( ഇലക്രടിക് ബൾബ്) നിർമ്മിച്ചത്? [Philamentu laampu ( ilakradiku balbu) nirmmicchath?]

Answer: തോമസ് ആൽവ എഡിസൻ (1879) [Thomasu aalva edisan (1879)]
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