The invention of the iconic acoustic phonograph recording flat disc format (Gramophone) was developed by whom? MCQ with Answer and Explanation

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The invention of the iconic acoustic phonograph recording flat disc format (Gramophone) was developed by whom?

A. Nikola Tesla

B. Alexander Graham Bell

C. Thomas Edison

D. Emile Berliner

Answer: Option D

Solution (By JKSSB Mock Tests)

Emile Berliner introduced flat zinc discs with lateral groove tracking in 1887, outperforming Edison's hollow wax storage cylinders.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The invention of the common high-pressure kitchen pressure cooker ('Digester') was invented by whom in 1679?

A. Blaise Pascal

B. James Watt

C. Denis Papin

D. Robert Boyle

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Correct Answer: Option C

Explanation:
French physicist Denis Papin invented the steam digester, which raised boiling temperatures by trapping internal steam pressure.

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Question #2

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Who discovered the planet Uranus in 1781?

A. Giovanni Cassini

B. Christiaan Huygens

C. William Herschel

D. Galileo Galilei

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Correct Answer: Option C

Explanation:
William Herschel discovered Uranus using a telescope he built himself, making it the first planet discovered in modern history.

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Question #3

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Who discovered the existence of infrared radiation in sunlight in 1800 using thermometers and a prism?

A. William Herschel

B. Heinrich Hertz

C. James Clerk Maxwell

D. Johann Wilhelm Ritter

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Correct Answer: Option A

Explanation:
William Herschel discovered infrared light by measuring the temperature rise just beyond the red end of the visible spectrum.

This question belongs to: Static General Knowledge Inventions and Discoveries

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