Who discovered that the element Thorium is radioactive, independently of Marie Curie's tracking experiments? MCQ with Answer and Explanation
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Question #1
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Who discovered the existence of blood capillaries linking arteries to veins, completing Harvey's circulation theory?
Correct Answer: Option B
Explanation:
Marcello Malpighi used primitive microscopes to observe capillaries in lung tissues in 1661.
Marcello Malpighi used primitive microscopes to observe capillaries in lung tissues in 1661.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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The invention of the carbon filament telephone transmitter (microphone) that improved long-distance audio was done by whom?
Correct Answer: Option B
Explanation:
Thomas Alva Edison invented the highly efficient carbon microphone, which became standard for telephone transmitters for decades.
Thomas Alva Edison invented the highly efficient carbon microphone, which became standard for telephone transmitters for decades.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The Hovercraft was invented by which British engineer?
Correct Answer: Option D
Explanation:
Sir Christopher Cockerell invented the hovercraft (amphibious craft supported by a cushion of air) in 1956.
Sir Christopher Cockerell invented the hovercraft (amphibious craft supported by a cushion of air) in 1956.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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