scientist, discoveries & inventions MCQ section 1 MCQ Questions & Answers Detailed Explanation

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Questions : Who introduced the concept of “Stored Program” ?

(a) John Mauchly

(b) John Von Neumann

(c) Blaise Pascal

(d) Charles Babbage

The correct answers to the above question in:

Answer: (b)

The concept of stored-program seals with storage of instructions in computer memory to enable it to perform a variety of tasks in sequence or intermittently. The idea was introduced in the late 1940s by John von Neumann.

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Question : 1

What is the name given to the outermost “planetoid” discovered recently in the Solar System ?

a) Asterix

b) Quark

c) Sedna

d) Xenon

Answer: (c)

Astronomers have discovered a new planetoid at the far edge of our Solar System. The new object, named Sedna, is probably almost as big as the smallest planet, Pluto.

Sedna is very, very far away. It is more than twice as far from the Sun as Pluto, and about 90 times as far from the Sun as Earth. Sedna is probably a huge ball of ice.

The ice is reddish in colour. There are probably chemicals in the ice that make it red. Sedna orbits the Sun once every 10,500 years. Its orbit takes it out to about 900 times as far from the Sun as the Earth.

Question : 2

Who discovered Television?

a) Baird

b) Franklin

c) Edison

d) Galileo

Answer: (a)

Question : 3

Which among the following events occurred first ?

a) Jonas E. Salk developed first polio vaccine

b) John Logy Baird demonstrated first television

c) Telecast of talking pictures on television by BBC

d) Alexander Flemming discovered pencillin

Answer: (b)

John Logy Baird demonstrated the first television on 26 January 1926, Alexander Fleming discovered penicillin in 1928, Telecast of talking pictures on television by BBC took place on 2 July 1967, Jonas E. Salk developed the first polio vaccine in 1952.

John Logie Baird was born on 14 August 1888 in Helensburgh on the west coast of Scotland, the son of a clergyman. In 1929, the German post office gave him the facilities to develop an experimental television service based on his mechanical system, the only one operable at the time.

Sound and vision were initially sent alternately and only began to be transmitted simultaneously from 1930.

Question : 4

‘Entomology’ is the science that studies

a) None of these

b) Behaviour of human beings

c) Insects

d) Formation of rocks

Answer: (c)

Entomology is the scientific study of insects, a branch of zoology. Like several of the other fields that are categorized within zoology, entomology is a taxon-based category.

At some 1.3 million described species, insects account for more than two-thirds of all known organisms.

Question : 5

The lysimeter helps in the estimation of

a) Wind direction

b) Evapotranspiration

c) Vapour pressure

d) Relative humidity

Answer: (b)

A lysimeter is used to measure the amount of actual evapotranspiration which is released by plants. By recording the amount of precipitation that an area receives and the amount lost through the soil, the amount of water lost to evapotranspiration can be calculated.

Question : 6

Who invented Cinema?

a) Dr. J. Brandenberger

b) Thomas Alva Edison

c) William Murdock

d) Nicolas and Jean Lumiere

Answer: (d)

The Lumière brothers, Auguste Marie Louis and Louis Jean were the earliest filmmakers in history. The Lumières held their first private screening of projected motion pictures in 1895.

Their first public screening of films at which admission was charged was held on December 28, 1895, at Salon Indien du Grand Café in Paris.

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