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Inventions and Discoveries

7. 

Aeroplane was invented by

A. Nicolas B. Volta C. Orville and Wilber Wright D. Ampere

Answer : C. Orville and Wilber Wright

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8. 

Crystals dynamics was invented by

A. Volta B. Graham Bell C. C.V. Raman D. Napier

Answer : C. C.V. Raman

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9. 

who invented ultra violet rays?

A. Hershal B. Curie C. Ritter D. Roentgen

Answer : A. Hershal

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10. 

Who is the scientist in whose honour the "chandra" X-ray telescope has been named?

A. Chandrasekar Venkatraman B. Jagadish Chandra Bose C. Prafulla Chandra Roy D. Subramanyan Chandra Sekar

Answer : D. Subramanyan Chandra Sekar

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11. 

Match List I correctly with List II and select your answer using the codes given below:

List I List II
a) Copernicus 1) Moons of jupiter
b) Kepler 2) Law of gravitation
c) Galileo 3) Helicocentric theory
d) Newton 4) Laws of planetary motion

A. a-1 ,b-2 ,c-3 ,d-4 B. a-4 ,b-3 ,c-1 ,d-2 C. a-3 ,b-1 ,c-4 ,d-2 D. a-3 ,b-4 ,c-1 ,d-2

Answer : D. a-3 ,b-4 ,c-1 ,d-2

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12. 

The force of attraction between planets was correctly given by

A. Kepler B. Newton C. Galileo D. Ptolemy

Answer : A. Kepler

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