What was Thomas Edison’s first patented invention?
Answer
Electric vote recorder
The well runs deep
Trivia questions and answers, drawn fresh from the well
239,757 public questions across 1,818 topics. Challenge yourself, or build the perfect quiz for game night.
239,757
Questions with answers
1,818
Topics to explore
3
Depths of difficulty
Today at the well
1 / 5 0
What was Thomas Edison’s first patented invention?
Answer
Electric vote recorder
In India, what is the standard frequency of alternating-current mains electricity?
Answer
50 hertz
Which scientist gives his name to the SI unit of capacitance, the farad?
Answer
Michael Faraday
What is the exact speed of light in a vacuum, a value central to electromagnetic theory?
Answer
299,792,458 metres per second
What is the name of the first artificial magnet made from a coil carrying electric current?
Answer
Electromagnet
0 / 5
Round complete
239,757 trivia questions
Every question has an answer
1,818 public topics
Something for every quiz
Free to explore
Reveal answers at your own pace
Fresh from the well
Latest trivia questions
Which scientist gives his name to the SI unit of capacitance, the farad?
Answer
Michael Faraday
What is the exact speed of light in a vacuum, a value central to electromagnetic theory?
Answer
299,792,458 metres per second
What was the first nuclear reactor to produce a self-sustaining chain reaction?
Answer
Chicago Pile-1
Who sent the first transatlantic radio signal in 1901?
Answer
Guglielmo Marconi
Who invented the Van de Graaff generator in 1929?
Answer
Robert J. Van de Graaff
What is the name of the region around a magnet where magnetic forces can be detected?
Answer
Magnetic field
Which particle carries electric current through a metal wire?
Answer
Electrons
What is the name of the three-phase electrical system used for most high-power transmission?
Answer
Three-phase power