Inventions and Discoveries MCQs

Static General Knowledge

Inventions and Discoveries MCQs

Practice Inventions and Discoveries MCQs with answers and detailed explanations covering famous inventors, scientific discoveries, technological innovations, important inventions, groundbreaking research, Nobel-winning discoveries and contributions to science and technology frequently asked in SSC, Railway, Banking, UPSC, JKSSB, Police, Defence, Teaching and other competitive examinations.

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Question #61
Who invented the first thermionic valve (vacuum tube diode) in 1904?
A. John Ambrose Fleming
B. Thomas Edison
C. Nikola Tesla
D. Lee de Forest
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Correct Answer: Option A

Explanation:
John Ambrose Fleming invented the oscillation valve, the first vacuum tube diode, which transformed radio technology.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #62
The fundamental laws of electric resistance ($V = IR$) were discovered by which physicist?
A. Georg Simon Ohm
B. James Watt
C. André-Marie Ampère
D. Alessandro Volta
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Correct Answer: Option A

Explanation:
Georg Simon Ohm discovered the direct proportionality between voltage and current across a conductor, known as Ohm's Law.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #63
Who invented the modern electronic television system utilizing a cathode ray tube (CRT)?
A. Thomas Edison
B. John Logie Baird
C. Philo Farnsworth
D. Guglielmo Marconi
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Correct Answer: Option C

Explanation:
Philo Farnsworth invented the first fully functional all-electronic television system with an image dissector camera tube.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #64
The cosmic microwave background radiation, confirming the Big Bang theory, was discovered by whom?
A. Arno Penzias and Robert Wilson
B. Stephen Hawking
C. Albert Einstein
D. Edwin Hubble
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Correct Answer: Option A

Explanation:
Arno Penzias and Robert Wilson accidentally discovered cosmic microwave background radiation in 1964, winning a Nobel Prize.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #65
Who discovered the element Sodium through the process of electrolysis?
A. Antoine Lavoisier
B. Humphry Davy
C. Jöns Jacob Berzelius
D. Michael Faraday
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Correct Answer: Option B

Explanation:
Sir Humphry Davy isolated sodium, potassium, calcium, and magnesium using electrolysis in the early 1800s.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #66
The invention of the machine gun is historically associated with which American inventor?
A. Oliver Winchester
B. John Browning
C. Samuel Colt
D. Richard Gatling
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Correct Answer: Option D

Explanation:
Richard Gatling invented the Gatling gun, the first highly successful rapid-fire multi-barrel machine gun, during the American Civil War.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #67
Who discovered the protozoan parasite causing Malaria in human red blood cells?
A. Ronald Ross
B. Louis Pasteur
C. Robert Koch
D. Charles Alphonse Laveran
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Correct Answer: Option D

Explanation:
Charles Alphonse Laveran discovered the malaria parasite in 1880, winning the Nobel Prize in 1907. Sir Ronald Ross later discovered that mosquitoes transmit it.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #68
Who invented the first operational stethoscope in 1816?
A. Joseph Lister
B. Louis Pasteur
C. Edward Jenner
D. René Laennec
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Correct Answer: Option D

Explanation:
René Laennec invented the acoustic stethoscope because he felt uncomfortable placing his ear directly on female patients' chests.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #69
The concept of absolute zero temperature and the thermodynamic scale was discovered by whom?
A. Lord Kelvin
B. Daniel Gabriel Fahrenheit
C. Anders Celsius
D. James Joule
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Correct Answer: Option A

Explanation:
William Thomson, later Lord Kelvin, proposed the absolute thermodynamic scale of temperature in 1848.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #70
Who is credited with the invention of the submarine 'Turtle', used in military action?
A. John Philip Holland
B. Cornelis Drebbel
C. David Bushnell
D. Robert Fulton
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Correct Answer: Option C

Explanation:
David Bushnell invented the Turtle in 1775, the first submarine ever used in combat.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #71
Who discovered the vaccine for Rabies?
A. Edward Jenner
B. Louis Pasteur
C. Jonas Salk
D. Robert Koch
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Correct Answer: Option B

Explanation:
Louis Pasteur developed the first vaccine against rabies by cultivating the virus in rabbits and drying the affected nerve tissue.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #72
The law of gas pressure stating that total pressure equals the sum of partial pressures was formulated by whom?
A. Robert Boyle
B. Joseph Louis Gay-Lussac
C. John Dalton
D. Jacques Charles
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Correct Answer: Option C

Explanation:
John Dalton formulated Dalton's Law of Partial Pressures in 1801 as part of his atmospheric research.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #73
Who invented the fountain pen with an efficient ink capillary feed mechanism in 1884?
A. John Loud
B. William Thompson
C. László Bíró
D. Lewis Waterman
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Correct Answer: Option D

Explanation:
Lewis Edson Waterman patented the first practical fountain pen with a reliable ink feed mechanism.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #74
Who discovered that white light is a mixture of seven fundamental component colors using a prism?
A. Christian Huygens
B. Thomas Young
C. Isaac Newton
D. James Clerk Maxwell
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Correct Answer: Option C

Explanation:
Sir Isaac Newton proved through prism experiments that white light decomposes into a continuous spectrum of colors.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #75
The ballistic missile (V-2 rocket) was primarily invented by which scientist?
A. Robert Goddard
B. Konstantin Tsiolkovsky
C. Hermann Oberth
D. Wernher von Braun
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Correct Answer: Option D

Explanation:
Wernher von Braun was the leading figure in the development of the V-2 rocket in Nazi Germany and later NASA space vehicles.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #76
Who discovered the antibiotic Streptomycin, the first effective cure for tuberculosis, winning a Nobel Prize in 1952?
A. Selman Waksman
B. Howard Florey
C. Edward Abraham
D. Alexander Fleming
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Correct Answer: Option A

Explanation:
Selman Waksman discovered several antibiotics produced by soil microbes, including streptomycin.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #77
Who invented the modern safety pin in 1849?
A. Walter Hunt
B. Elias Howe
C. Eli Whitney
D. Isaac Singer
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Correct Answer: Option A

Explanation:
Walter Hunt invented the safety pin in 1849 and sold the patent rights for just 400 dollars to pay off a debt.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #78
The first accurate measurement of the speed of light using astronomical observations of Jupiter's moons was performed by whom?
A. Ole Rømer
B. Albert Michelson
C. Armand Fizeau
D. Léon Foucault
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Correct Answer: Option A

Explanation:
Danish astronomer Ole Rømer made the first quantitative measurement of the speed of light in 1676.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #79
Who invented the alkaline storage battery and the phonograph?
A. Michael Faraday
B. Thomas Edison
C. Alessandro Volta
D. Nikola Tesla
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Correct Answer: Option B

Explanation:
Thomas Alva Edison developed the phonograph in 1877 and later engineered the commercial alkaline storage battery.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #80
Who discovered the radioactive elements Radium and Polonium?
A. Henri Becquerel
B. Marie and Pierre Curie
C. Otto Hahn
D. Ernest Rutherford
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Correct Answer: Option B

Explanation:
Marie Skłodowska-Curie and her husband Pierre isolated polonium and radium from pitchblende ore in 1898.
This question belongs to: Static General Knowledge Inventions and Discoveries

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