Who discovered the mathematical value and formula for the Universal Gravitational Constant ($G$) using a torsion balance? MCQ with Answer and Explanation

Question
Who discovered the mathematical value and formula for the Universal Gravitational Constant ($G$) using a torsion balance?
A. Albert Einstein
B. Robert Hooke
C. Isaac Newton
D. Henry Cavendish
Answer: Option D
Solution (By JKSSB Mock Tests)
Henry Cavendish measured the density of the Earth and effectively calculated the value of the gravitational constant $G$ in 1798.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who discovered the radioactive gas Radon in 1900?
A. William Ramsay
B. Marie Curie
C. Friedrich Ernst Dorn
D. Ernest Rutherford
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Correct Answer: Option C

Explanation:
Friedrich Ernst Dorn discovered radon while studying the radioactive decay chain of radium emissions.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who is known for inventing the first commercially viable steam engine with a separate condenser?
A. Thomas Newcomen
B. James Watt
C. Robert Fulton
D. George Stephenson
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Correct Answer: Option B

Explanation:
James Watt radically improved the Newcomen steam engine by introducing a separate condenser, driving the Industrial Revolution.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who invented the first practical mechanical television system?
A. Vladimir Zworykin
B. Philo Farnsworth
C. John Logie Baird
D. Guglielmo Marconi
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Correct Answer: Option C

Explanation:
John Logie Baird demonstrated the first working mechanical television system in the 1920s.
This question belongs to: Static General Knowledge Inventions and Discoveries
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