Who is credited with inventing the wireless telegraph (radio communication)? MCQ with Answer and Explanation

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Who is credited with inventing the wireless telegraph (radio communication)?

A. Nikola Tesla

B. Guglielmo Marconi

C. Heinrich Hertz

D. Alexander Graham Bell

Answer: Option B

Solution (By JKSSB Mock Tests)

Guglielmo Marconi developed the first successful long-distance wireless telegraphy system, winning the Nobel Prize in Physics in 1909.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The invention of the common mechanical cash register to prevent employee theft was patented by whom in 1879?

A. Elisha Otis

B. Walter Hunt

C. Christopher Sholes

D. James Ritty

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Correct Answer: Option D

Explanation:
Saloon owner James Ritty designed 'Ritty's Incorruptible Cashier' after observing the revolutions of a ship's propeller tracker.

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Question #2

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The laser (Light Amplification by Stimulated Emission of Radiation) was first constructed by whom in 1960?

A. Arthur Schawlow

B. Albert Einstein

C. Charles Townes

D. Theodore Maiman

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Correct Answer: Option D

Explanation:
Theodore Maiman built the first functioning laser in 1960 at Hughes Research Laboratories, using a synthetic ruby crystal.

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Question #3

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Who discovered that the chemical element Vanadium exists within iron slag residues, verifying its modern entry?

A. Jöns Jacob Berzelius

B. Andrés Manuel del Río

C. Martin Klaproth

D. Nils Gabriel Sefström

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Correct Answer: Option D

Explanation:
Del Río noticed it early in Mexico ('erythronium'), but Sefström isolated and confirmed the element in Swedish iron ores in 1830.

This question belongs to: Static General Knowledge Inventions and Discoveries

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