The question asks to identify the inventor of the electric telegraph. This is a direct factual recall question related to significant inventions in communication technology. We need to associate the invention with the correct historical figure.
Correct Option: A) Samuel Morse is credited with inventing the electric telegraph. He developed the first practical electric telegraph system in the 1830s and also co-developed the Morse code, which became the primary language for telegraphic communication.
The question asks for the year the first successful telegraph message was sent. This is a historical fact related to the invention and development of the telegraph.
B) 1844 — This is the year when Samuel Morse sent the famous message "What hath God wrought?" from Washington D.C. to Baltimore, Maryland, marking the first successful long-distance telegraph message.
The question asks for the content of the very first official Morse code message sent by Samuel Morse. This is a historical fact related to the invention and demonstration of the telegraph.
B) "What hath God wrought?" This was indeed the first official message transmitted via telegraph using Morse code on May 24, 1844, marking a pivotal moment in communication history.
The question asks about the fundamental components used in Morse code to represent letters and numbers. We need to recall the basic principle of how Morse code works.
C) Dots and dashes — Morse code is universally recognized for its use of short signals (dots) and long signals (dashes) to encode alphanumeric characters and punctuation. This is the fundamental symbolic system of Morse code.
The question asks to identify the two cities connected by the first long-distance telegraph line in the United States. This is a historical fact related to the invention and early implementation of the telegraph.
B) Baltimore and Washington, D.C.
Samuel Morse successfully demonstrated his telegraph system by sending the famous message "What hath God wrought?" from the Supreme Court chamber in the U.S. Capitol in Washington, D.C., to the B&O Railroad Depot in Baltimore, Maryland, on May 24, 1844. This marked the opening of the first long-distance telegraph line in the United States.
The question asks for the specific device used to interpret Morse code signals in a telegraph system. Understanding the basic components and functions of a telegraph system is key to answering this.
Correct Option: B) Receiver
In a telegraph system, the device that takes the incoming electrical signals (representing Morse code) and converts them into an interpretable format (like sound or printed marks) is called a receiver. It "receives" the coded message and makes it understandable.