Bissoy.com
Doctors Medicines MCQs Q&A

In 1877 Thomas Alva Edison made indentations in a strip of coated paper with a stylus connected to a transmitter. When he pulled the strip back through the apparatus, he was astonished to hear that it produced a sound. What had he just invented?

In 1877 Thomas Alva Edison made indentations in a strip of coated paper with a stylus connected to a transmitter. When he pulled the strip back through the apparatus, he was astonished to hear that it produced a sound. What had he just invented? Correct Answer the phonograph

In 1877 Thomas Alva Edison achieved his most original discovery, the phonograph. Some earlier researchers had theorized that each sound, if it could be graphically recorded, would produce a distinct shape resembling shorthand, or phonography (“sound writing”), as it was then known. Edison hoped to reify this concept by employing a stylus-tipped carbon transmitter to make impressions on a strip of paraffined paper. To his astonishment, the scarcely visible indentations generated a vague reproduction of sound when the paper was pulled back beneath the stylus. Edison unveiled the tinfoil phonograph, which replaced the strip of paper with a cylinder wrapped in tinfoil, in December 1877.

Related Questions

Which modern company resulted from an 1892 merger with Thomas Alva Edison’s company Edison Electric?
The following question contains four sentences which in their present arrangement lack coherence, connection, and development. There is only one way of rearranging them to make a coherent passage. Choose the correct arrangement from the alternative given and mark your answer as (1), (2), (3), or (4) in the answer sheet. a. He explained the procedure of boiling the eggs and went away. b. Thomas Alva Edison was a great scientist. He had a cook. c. By the time he returned, the scientist was boiling the watch and looking at the egg. d. The cook had to go out for some time.
In a year-end examination, 6 papers-Maths, Physics, Geography, Economics, Chemistry, History- are scheduled on 6 consecutive days of a week (Monday -Saturday). 1. Maths paper is after the Chemistry paper, with a 1-day gap between them. 2. Physics paper is on Monday. 3. Geography paper is not on the last day. 4. History paper, which is scheduled on the previous day of the Maths paper, has a two-day gap with the Physics paper. In the above description, the History paper was cancelled due to incompletion of syllabus and the exam was scheduled for five days (Monday - Friday), with the order of the papers reversed. Which paper was scheduled on Thursday? 
In a year-end examination, 6 papers-Maths, Physics, Geography, Economics, Chemistry, History- are scheduled on 6 consecutive days of a week (Monday -Saturday). 1. Maths paper is after the Chemistry paper, with a 1-day gap between them. 2. Physics paper is on Monday. 3. Geography paper is not on the last day. 4. History paper, which is scheduled on the previous day of the Maths paper, has a two-day gap with the Physics paper. Which paper is scheduled on Saturday?
(Make meaningful sentences using the following jumbles) Thomas Alva Edison ------ P. influenced life around the world, including Q. developed devices that greatly R. phonograph, motion picture camera S. and the electric light bulb
Which of the following inventions were done by Thomas Alva Edison?
Who designed the pendulum clock? A. Galileo Galilei B. Thomas Alva Edison C. Frederick Jones D. Davidson
Which of the following is not among the inventions of the Thomas Alva Edison?
Student A rub solid baking soda on dry litmus paper, B rub metal oxide on dry litmus paper, C dip litmus paper in vinegar, D dip litmus paper in aqueous solution of baking soda. The observations were made by student A, B, C, and D should be- Student Effect on dry red litmus paper Effect on dry blue litmus paper A Color Changed to blue No change B No change Color changed to red C No change Color changed to red D Color Changed to blue       Color changed to red The correct observation was made by the student
In the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements. Statements: All paper is newspaper. Some paper is tissue Only few tissues are  paper  boats. Conclusions: I. All paper boats can be tissue. II. No paper is paper boat. III. Some paper is newspaper.