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

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

A. Heinrich Hertz

B. Guglielmo Marconi

C. Alan Turing

D. Robert Watson-Watt

Answer: Option D

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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The invention of the carbon-14 dating technique to determine the age of organic materials was developed by whom?

A. Marie Curie

B. Willard Libby

C. Otto Hahn

D. Ernest Rutherford

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Correct Answer: Option B

Explanation:
Willard Libby led the team that developed radiocarbon dating in 1949, winning the 1960 Nobel Prize in Chemistry.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered the link between electricity and magnetism by observing a compass needle deflect near a current-carrying wire in 1820?

A. Hans Christian Ørsted

B. Michael Faraday

C. André-Marie Ampère

D. James Clerk Maxwell

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Correct Answer: Option A

Explanation:
Hans Christian Ørsted discovered electromagnetism when he noticed an electric current deflected a magnetic compass needle.

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Question #3

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Who discovered the planet Neptune using mathematical calculations before it was verified by telescope?

A. Galileo Galilei

B. Urbain Le Verrier and John Couch Adams

C. Johannes Kepler

D. William Herschel

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Correct Answer: Option B

Explanation:
Urbain Le Verrier and John Couch Adams independently calculated the location of Neptune based on irregularities in Uranus's orbit.

This question belongs to: Static General Knowledge Inventions and Discoveries

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