Who discovered that electrical currents pass through vacuum cavities via discrete streams named 'Cathode Rays'? MCQ with Answer and Explanation

Question
Who discovered that electrical currents pass through vacuum cavities via discrete streams named 'Cathode Rays'?
A. Michael Faraday
B. Wilhelm Röntgen
C. William Crookes and Julius Plücker
D. J.J. Thomson
Answer: Option C
Solution (By JKSSB Mock Tests)
Plücker observed early glow phenomena, and Crookes engineered highly evacuated discharge tubes to isolate ray behaviors.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The concept of 'Inertia' was first formulated by which scientist before being formalized into laws by Newton?
A. Johannes Kepler
B. Aristotle
C. Nicolaus Copernicus
D. Galileo Galilei
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Correct Answer: Option D

Explanation:
Galileo Galilei developed the early concept of inertia, which Isaac Newton later refined into his First Law of Motion.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The expanding nature of the universe was discovered by which astronomer?
A. Galileo Galilei
B. Johannes Kepler
C. Edwin Hubble
D. Albert Einstein
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Correct Answer: Option C

Explanation:
Edwin Hubble discovered in 1929 that galaxies are moving away from each other, indicating that the universe is expanding.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who invented the first functional integrated circuit (microchip) in 1958?
A. Alan Turing
B. John Bardeen
C. Jack Kilby and Robert Noyce
D. Douglas Engelbart
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Correct Answer: Option C

Explanation:
Jack Kilby of Texas Instruments constructed the first working monolithic integrated circuit on a germanium chip, winning a Nobel Prize.
This question belongs to: Static General Knowledge Inventions and Discoveries
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