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

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

A. Denis Papin

B. James Watt

C. Robert Boyle

D. Blaise Pascal

Answer: Option A

Solution (By JKSSB Mock Tests)

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

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the primary mathematical law detailing electric current branching paths, known as the junction rule?

A. André-Marie Ampère

B. Michael Faraday

C. Georg Ohm

D. Gustav Kirchhoff

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Correct Answer: Option D

Explanation:
Kirchhoff's Junction Rule states that the total current entering any electrical network node precisely matches the total current exiting it.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered the precise value of the physical constant detailing the number of structural units in one mole of material?

A. Max Planck

B. Jean Perrin

C. John Dalton

D. Amedeo Avogadro

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Correct Answer: Option B

Explanation:
While the constant is named after Avogadro, Jean Perrin calculated its exact value through experimental tracking of Brownian motion, winning a Nobel Prize.

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Question #3

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Who discovered that the planet Uranus possesses a distinct set of narrow equatorial rings?

A. William Herschel

B. Galileo Galilei

C. Giovanni Cassini

D. James L. Elliot, Edward W. Dunham, and Douglas J. Mink

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Correct Answer: Option D

Explanation:
The rings of Uranus were discovered in 1977 during airborne stellar occultation observations, when the planet blocked a background star's light.

This question belongs to: Static General Knowledge Inventions and Discoveries

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