scientist, discoveries & inventions MCQ section 4 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general awareness mcq - 4 EXERCISES
The following question based on scientist, discoveries & inventions topic of general awareness mcq
(a) Georges de Mestral
(b) Richard James
(c) P. T. Farnsworth
(d) Charles Ginsberg
The correct answers to the above question in:
Answer: (d)
A videotape is a recording of images and sounds onto magnetic tape as opposed to film stock used in filmmaking or random access digital media. Videotapes are also used for storing scientific or medical data, such as the data produced by an electrocardiogram.
Charles P. Ginsburg invented the videotape. He worked for Ampex and was inspired by the reel-to-reel machines used for recording sound.
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Read more scientist discoveries and inventions Based General Awareness Questions and Answers
Question : 1
Who invented the ‘World Wide Web’ ?
a) Charles Babbage
b) Tim Berners-Lee
c) R. Samuel Tomlinson
d) Martin Cooper
Answer »Answer: (b)
World Wide Web (www) was invented by English scientist Tim Berners-Lee in 1989. It is an information space where documents and other web resources are identified by URLs, interlinked by hypertext links, and can be accessed via the Internet.
Question : 2
In Einstein’s equation E = mc2 , c denotes
a) Wavelength
b) A constant
c) Velocity of sound
d) Speed of light
Answer »Answer: (d)
Question : 3
The Nobel Prize for deciphering the language of bee was awarded to
a) Julian Huxley
b) Dorothy Hodgkins
c) H.G. Khurana
d) K.V. Frisch
Answer »Answer: (d)
Question : 4
Gunpowder was invented by
a) Dr. Gatting
b) Roger Bacon
c) C.V. Raman
d) Colt
Answer »Answer: (b)
Gunpowder was the first chemical explosive and the only one known until the invention of nitrocellulose, nitroglycerin, smokeless powder, and TNT in the second half of the 19th century.
Prior to the invention of gunpowder, many incendiary and burning devices had been used, including Greek fire. Roger Bacon invented gunpowder.
Question : 5
Richter Scale is used for measuring :
a) Humidity of air
b) Velocity of wind
c) Magnitude of earthquake
d) Density of liquid
Answer »Answer: (c)
There are two ways in which scientists quantify the size of earthquakes: magnitude and intensity.
Magnitude measures the energy released at the source of the earthquake; Intensity measures the strength of shaking produced by the earthquake at a certain location. The Richter Scale is used for measuring the magnitude of earthquakes.
The magnitude value is proportional to the logarithm of the amplitude of the strongest wave during an earthquake. The mercalli scale is used to measure the intensity of earthquakes. The intensity of a quake differs greatly from place to place.
It depends upon such factors as the distance from the epicentre, the design and quality of construction of local buildings, and the type of surface beneath the buildings.
Question : 6
Who among the following scientists propounded the New Theory of Relativity?
a) S. Chandrashekhar
b) B.D. Nag Choudhary
c) J.V. Narlikar
d) M.M. Krishnan
Answer »Answer: (c)
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