Who discovered the presence of electrons within stable atomic configurations by modeling the 'Plum Pudding' atom? MCQ with Answer and Explanation

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Who discovered the presence of electrons within stable atomic configurations by modeling the 'Plum Pudding' atom?

A. Niels Bohr

B. John Dalton

C. Ernest Rutherford

D. J.J. Thomson

Answer: Option D

Solution (By JKSSB Mock Tests)

J.J. Thomson proposed the model where small negatively charged electrons are embedded in a uniform sphere of positive charge.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the process of nuclear fission in heavy elements, winning the Nobel Prize in Chemistry in 1944?

A. Lise Meitner

B. Niels Bohr

C. Otto Hahn

D. Enrico Fermi

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Correct Answer: Option C

Explanation:
German chemist Otto Hahn discovered nuclear fission of uranium in 1938 alongside Fritz Strassmann.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who invented the alkaline storage battery and the phonograph?

A. Nikola Tesla

B. Alessandro Volta

C. Thomas Edison

D. Michael Faraday

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Correct Answer: Option C

Explanation:
Thomas Alva Edison developed the phonograph in 1877 and later engineered the commercial alkaline storage battery.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

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Who discovered that magnetic fields can split atomic spectral emission lines, a phenomenon known as the Zeeman Effect?

A. Pieter Zeeman

B. Max Planck

C. Johannes Stark

D. Hendrik Lorentz

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Correct Answer: Option A

Explanation:
Zeeman discovered the magnetic line splitting in 1896, which Lorentz explained theoretically, earning them a shared 1902 Nobel Prize.

This question belongs to: Static General Knowledge Inventions and Discoveries

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