Thomas Edison — Questions and answers
What did Thomas Edison unveil on December 31, 1879, at his laboratory?
Answer: B) The world's first practical, long-lasting incandescent light bulb
What happened to Thomas Edison in his early teens that made him focus more inward?
Answer: C) He experienced profound hearing loss.
What revolutionary device did Thomas Edison develop that allowed four messages to be sent at once?
Answer: B) The Quadruplex telegraph
What was the first thing Thomas Edison spoke into the phonograph to test it?
Answer: C) "Mary Had a Little Lamb"
What did the Menlo Park laboratory become known as because it produced many ideas and patents?
Answer: B) An 'invention factory'
What material did Edison's team discover that worked as a durable filament for the light bulb?
Answer: C) A carbonized cotton sewing thread
What two types of electric current were part of the 'War of the Currents' rivalry?
Answer: B) Direct Current (DC) and Alternating Current (AC)
Besides his many inventions, what else did Thomas Edison revolutionize?
Answer: B) The process of innovation and research itself