In which year was Nuclear power first used to produce electricity ?
Answer: A
It was 1951.
Experimental Breeder Reactor I in Idaho lit four light bulbs on 20 December 1951 - the first electricity generated from nuclear energy. The first station to supply a grid was Obninsk in the Soviet Union in 1954.
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In which year was World Wide Web first publicly introduced
Answer: B
It was introduced publicly in 1990.
Tim Berners-Lee wrote the first browser and server at CERN in late 1990, and the Web was opened outside CERN in 1991. CERN placed the technology in the public domain in 1993.
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Integrated circuit was created by two engineers working separately in
Answer: C
It was created in 1958-59.
Jack Kilby built the first working integrated circuit at Texas Instruments in September 1958, on germanium with wire connections. Robert Noyce at Fairchild produced a silicon version months later with the connections printed on - the design the industry adopted.
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By which country was Atomic bomb was first successfully developed
Answer: A
The United States developed it.
The Manhattan Project tested the first device at Alamogordo on 16 July 1945, and bombs were dropped on Hiroshima and Nagasaki the following month. The Soviet Union followed in 1949, Britain in 1952, France in 1960, China in 1964 and India in 1974.
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Frequency modulation radio 'FM' was invented by
Answer: B
Edwin H. Armstrong invented FM radio.
He demonstrated frequency modulation in 1933, which gave far better sound and immunity to the static that ruined AM reception in storms. RCA obstructed it for years, and Armstrong took his own life in 1954 in the middle of the litigation.
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Nancy Johnson invented hand-cranked ice cream churn in
Answer: A
It was 1843.
Nancy Johnson patented the hand-cranked ice cream churn, in which a paddle inside a cylinder was turned by hand while the cylinder sat in a bucket of ice and salt. The design is still the basis of domestic ice cream makers.
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John Lawrence Smith invented inverted microscope in
Answer: A
It was 1850.
John Lawrence Smith devised the inverted microscope, with the objective below the stage and the light source above, so that specimens in liquid in a dish could be examined from beneath. It is now standard in cell culture work.
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