Who discovered the precise value of the physical constant detailing the number of structural units in one mole of material? MCQ with Answer and Explanation

Question

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

A. John Dalton

B. Jean Perrin

C. Max Planck

D. Amedeo Avogadro

Answer: Option B

Solution (By JKSSB Mock Tests)

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

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The invention of the wind tunnel for testing aerodynamic structures was first successfully built by whom?

A. Francis Herbert Wenham

B. Otto Lilienthal

C. Gustave Eiffel

D. Wright Brothers

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Correct Answer: Option A

Explanation:
Francis Herbert Wenham designed and operated the first enclosed operational wind tunnel in 1871 for the Aeronautical Society of Great Britain.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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The invention of the first functional program-controlled electronic binary computing architecture, the EDSAC, was completed where?

A. Harvard University

B. University of Pennsylvania

C. University of Cambridge by Maurice Wilkes

D. Stanford Research Institute

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Correct Answer: Option C

Explanation:
The EDSAC (Electronic Delay Storage Automatic Calculator) performed its first calculation in 1949, applying von Neumann's stored-program architecture.

This question belongs to: Static General Knowledge Inventions and Discoveries