Miscellaneous (Physics) (Part-2)

Total Questions: 58

41. Who among the following invented the 'chronometer"? [S.S.C. Online C.P.O.S.I. (T-1) 2.07.2017 (Shift-1)]

Correct Answer: (a) John Harrison
Solution:John Harrison, an English carpenter and clockmaker, is widely credited with inventing the first practical marine chronometer in the 18th century.
  • This highly accurate timekeeping device was crucial for determining longitude at sea, revolutionizing navigation and significantly improving the safety of long-distance sea travel.

42. Who invented logarithms? [S.S.C. Online CHSL (T-1) 16.01.2017 (Shift-1)]

Correct Answer: (d) John Napier
Solution:John Napier was a Scottish mathematician, physicist, astronomer, and astrologer.

He published his work on logarithms in 1614, in a book titled "Mirifici Logarithmorum Canonis Descriptio" (Description of the Marvelous Rule of Logarithms).

His invention provided a revolutionary tool for simplifying complex calculations, particularly in astronomy and navigation, by transforming multiplication and division into addition and subtraction.

43. Who invented Rocket? [S.S.C. Online CHSL (T-1) 18.01.2017 (Shift-11)]

Correct Answer: (c) Robert Goddard
Solution:Robert Goddard was an American engineer, physicist, and inventor.
  • He invented Rocket. He achieved this significant milestone on March 16, 1926.
  • His work was foundational for the development of modern rocketry and space exploration.

44. Electric tram was invented by _______ . [S.S.C. Online CHSL (T-I) 9.01.2017 (Shift-1)]

Correct Answer: (a) Fyodor Pirotsky
Solution:Fyodor Pirotsky was a Russian engineer who conducted experiments with electric trams in the late 19th century.
  • In 1880, he successfully operated an electric tramcar near St. Petersburg, using an electric current transmitted through the rails.
  • While not immediately commercially successful on a large scale, his work was a significant early step in the development of electric tramways.

Kolkata trams: Iconic Indian city landmark faces extinction

45. Who invented the Lightning Rod in 1749? [S.S.C. Online CHSL (T-1) 19.01.2017 (Shift-III)]

Correct Answer: (a) Benjamin Franklin
Solution:The lightning rod was invented by Benjamin Franklin in 1749.
Key Facts:

Franklin conducted famous experiments with electricity, including the kite experiment in 1752, to prove that lightning is a form of electricity.

Based on his findings, he designed the lightning rod to protect buildings from lightning strikes by directing the electric charge safely into the ground.

46. Who invented the lightning Conductor? [S.S.C. Online MTS (T-J) 10.10.2017 (Shift-I)]

Correct Answer: (c) Benjamin Franklin
Solution:The lightning conductor (also known as a lightning rod) was invented by Benjamin Franklin in the 18th century, specifically around 1749–1752.

A lightning conductor is a metal rod mounted on top of a building and connected to the ground. Its purpose is to:

Attract lightning strikes, and Safely conduct the electric charge into the earth, preventing damage to structures.

47. Hypertext was invented by__________. [S.S.C. Online CHSL (T-1) 19.01.2017 (Shih-11)]

Correct Answer: (d) Ted Nelson
Solution:Hypertext was invented by Ted Nelson in 1965.

Key Facts:

  • Ted Nelson, an American computer scientist, coined the term "hypertext" in 1965.
  • He introduced it as part of his Project Xanadu, which aimed to create a universal, non-linear writing and reading system.
  • Hypertext refers to text displayed on a computer or device that contains links to other text, allowing for easy navigation — a foundational concept of the World Wide Web.

48. Assembly line was invented by- [S.S.C. Online CHSL (T-1) 1.02.2017 (Shift-II)]

Correct Answer: (d) Ransom Eli Olds
Solution:Assembly line is a process of manufacturing in which the applicable parts are installed in a predetermined order.

It was discovered by Ransom Eli Olds.

49. Barcode scanner was invented in_________. [S.S.C. Online CHSL (T-1) 31 peveJejer, 2017 (Shift-II)]

Correct Answer: (b) 1974
Solution:A barcode reader is an input device of computer hardware that is used to read the information that is given in the barcode.

There are mainly five parts of a bar code-

  1. Quiet Zone,
  2. Start Zone,
  3. Start Character,
  4. Data Character
  5. and Stock Character.

It was discovered by Joy Woodland. In 1974, a barcoding system using modern UPC codes was first used to scan products.

50. Barograph was invented by- [S.S.C. Online CHSL (T-I) 7.01.2017 (Shift-I)]

Correct Answer: (a) Lucien Vidi
Solution:Barograph is a borometer that records the barometric pressure over time in graphical form to make a continuous recording of atmospheric pressure.

It was Invented by Lucien Vidi in 1844.