22
Q:

This statesman,politican,scholar,inventor,and one of early presidents of USA invented the swivel chair,the spherical sundial,the moldboard plow,and the cipher wheel.

A) George Washington B) Alexander Hamilton
C) John Adams D) Thomas Jefferson

Answer:   D) Thomas Jefferson



Explanation:

 Thomas Jefferson (April 13, 1743 – July 4, 1826) was the third President of the United States (1801-1809) and the principal author of the Declaration of Independence (1776).

Subject: Inventions
Q:

Who invented ECG?

A) Hans Berger B) Einthoven
C) G. Bist D) None of the above
 
Answer & Explanation Answer: B) Einthoven

Explanation:
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4 226
Q:

Who designed the first electronic computer ENIAC?

A) J presper Eckert and John W Mauchly B) John W Mauchly and Joseph M Jacquard
C) J presper Eckert and Von Neuman D) None of the above
 
Answer & Explanation Answer: A) J presper Eckert and John W Mauchly

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0 194
Q:

Who invented FM radio?

A) Edwin Howard Armstrong B) Thomas Alva Edison
C) Graham Bell D) Galileo
 
Answer & Explanation Answer: A) Edwin Howard Armstrong

Explanation:
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0 326
Q:

Who invented Radio?

A) Grahambell B) Galileo
C) Marconi D) Edison
 
Answer & Explanation Answer: C) Marconi

Explanation:

Guglielmo Marconi, an Italian invetor invented Radio in 1890's.

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0 324
Q:

The credit of inventing the television goes to

A) Philo Farnsworth B) John Logie Baird
C) Charles Francis Jenkins D) None of the above
 
Answer & Explanation Answer: A) Philo Farnsworth

Explanation:

The credit of inventing the television goes to Philo Farnsworth. Electronic television was first successfully demonstrated in San Francisco on Sept. 7, 1927.

 

The_credit_of_inventing_the_television_goes_to1549279715.jpg image

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0 344
Q:

Which among the following is not correctly matched?

A) Parachute: W H carothers B) Barometer: Torricelli
C) Cells: Robert Hooke D) X- Ray: W Roentgen
 
Answer & Explanation Answer: A) Parachute: W H carothers

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1 365
Q:

What did Sir William Herschel discover in 1800?

A) Ultraviolet rays B) Infra-red radiation
C) X rays D) Microwaves
 
Answer & Explanation Answer: B) Infra-red radiation

Explanation:

Sir William Herschel discovered Infra-red radiation in 1800.

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0 352
Q:

In which country the hormone gibberellin was discovered?

A) India B) Japan
C) China D) Russia
 
Answer & Explanation Answer: B) Japan

Explanation:

The hormone gibberellin was discovered in the country Japan.

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