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. Gustav Kirchhoff

B. Michael Faraday

C. Georg Ohm

D. André-Marie Ampère

Answer: Option A

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.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The discovery of the mechanism of the greenhouse effect in the atmosphere is first attributed to which scientist?

A. John Tyndall

B. Svante Arrhenius

C. Guy Stewart Callendar

D. Joseph Fourier

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Correct Answer: Option D

Explanation:
Joseph Fourier recognized in 1824 that Earth's atmosphere acts like an insulator, warming the planet's surface.

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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. Amedeo Avogadro

C. John Dalton

D. Jean Perrin

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Correct Answer: Option D

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 developed the first successful polio vaccine in 1955?

A. Edward Jenner

B. Louis Pasteur

C. Albert Sabin

D. Jonas Salk

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Correct Answer: Option D

Explanation:
Jonas Salk developed the first successful inactivated polio vaccine (IPV) in 1955, while Albert Sabin later developed the oral polio vaccine.

This question belongs to: Static General Knowledge Inventions and Discoveries

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