Who invented the radar (Radio Detection and Ranging) system used by Britain during World War II? MCQ with Answer and Explanation

Question
Who invented the radar (Radio Detection and Ranging) system used by Britain during World War II?
A. Alan Turing
B. Robert Watson-Watt
C. Guglielmo Marconi
D. Heinrich Hertz
Answer: Option B
Solution (By JKSSB Mock Tests)
Sir Robert Watson-Watt developed the first practical and deployable radar tracking systems for aircraft tracking.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the modern steam turbine, which enabled large-scale thermal electric power generation, was made by whom?
A. Charles Parsons
B. George Stephenson
C. James Watt
D. Thomas Newcomen
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Correct Answer: Option A

Explanation:
Sir Charles Parsons invented the multi-stage steam turbine in 1884, transforming maritime shipping and electric grids.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
Who discovered the planet Uranus in 1781?
A. Christiaan Huygens
B. William Herschel
C. Giovanni Cassini
D. Galileo Galilei
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Correct Answer: Option B

Explanation:
William Herschel discovered Uranus using a telescope he built himself, making it the first planet discovered in modern history.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
The first practical mechanical sewing machine was patented by whom in 1846?
A. Walter Hunt
B. Eli Whitney
C. Elias Howe
D. Isaac Singer
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Correct Answer: Option C

Explanation:
Elias Howe patented the first practical lockstitch sewing machine in the United States in 1846.
This question belongs to: Static General Knowledge Inventions and Discoveries
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