Who invented the first commercially practical incandescent light bulb in 1879? MCQ with Answer and Explanation

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Who invented the first commercially practical incandescent light bulb in 1879?

A. Joseph Swan

B. Nikola Tesla

C. Thomas Edison

D. Humphry Davy

Answer: Option C

Solution (By JKSSB Mock Tests)

Thomas Alva Edison developed a fully practical carbon-filament incandescent lamp and public power utility system.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who invented the liquid-fueled rocket engine, launching the world's first successful prototype in 1926?

A. Wernher von Braun

B. Konstantin Tsiolkovsky

C. Hermann Oberth

D. Robert Goddard

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Correct Answer: Option D

Explanation:
Robert H. Goddard launched the first liquid-fueled rocket (using gasoline and liquid oxygen) in Auburn, Massachusetts.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered the phenomenon of piezoelectricity in crystals in 1880?

A. Pierre and Jacques Curie

B. Heinrich Hertz

C. Wilhelm Röntgen

D. Marie Curie

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Correct Answer: Option A

Explanation:
Brothers Pierre and Jacques Curie discovered that physical stress applied to certain crystals generates an electric charge.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

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Who discovered the presence of cosmic background radiation anisotropy using data from the WMAP satellite instrument?

A. Arno Penzias

B. Robert Wilson

C. Charles L. Bennett and the NASA team

D. Edwin Hubble

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Correct Answer: Option C

Explanation:
The Wilkinson Microwave Anisotropy Probe mapped localized density variations in primordial background energy structures with high precision.

This question belongs to: Static General Knowledge Inventions and Discoveries

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