Who discovered the primary mathematical law detailing electric current branching paths, known as the junction rule? MCQ with Answer and Explanation

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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. Georg Ohm

C. Michael Faraday

D. Gustav Kirchhoff

Answer: Option D

Solution (By JKSSB Mock Tests)

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

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Who discovered the phenomenon of specific biological chemical pathways known as carbon fixation or the dark reactions of photosynthesis?

A. Robert Emerson

B. Melvin Calvin

C. Louis Pasteur

D. Hans Krebs

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Correct Answer: Option B

Explanation:
Melvin Calvin traced the pathway of carbon absorption in plants using carbon-14, establishing the Calvin-Benson Cycle.

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Question #2

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Who invented the first successful gas mask used widely in industrial safety and military applications?

A. Garrett Morgan

B. Nikola Tesla

C. Alexander Fleming

D. Thomas Edison

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Correct Answer: Option A

Explanation:
African-American inventor Garrett Morgan patented the safety hood/smoke protector device in 1914, which laid the foundation for modern gas masks.

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Question #3

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The invention of the common household safety matchbox strike face mixture containing red phosphorus was patented by whom?

A. Robert Boyle

B. John Walker

C. Humphry Davy

D. Pasch Brothers and John Lundström

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Correct Answer: Option D

Explanation:
The Swedish inventors split match chemical triggers, rendering matches safe from accidental friction ignition in pocket storage.

This question belongs to: Static General Knowledge Inventions and Discoveries

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