General Principles in the Working of Telegraphs, Telephone NDA Questions

NDA Physics

General Principles in the Working of Telegraphs, Telephone MCQ Questions


7.
Which invention is considered the direct predecessor of the electric telegraph?
A.
Semaphore
B.
Telephone
C.
Radio
D.
Phonograph
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ANSWER :
A. Semaphore
8.
Who was Samuel Morse’s partner in developing the telegraph?
A.
Alfred Vail
B.
Thomas Edison
C.
Elisha Gray
D.
Michael Faraday
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ANSWER :
A. Alfred Vail
9.
Which code system did the telegraph primarily use?
A.
ASCII
B.
Binary code
C.
Morse code
D.
Braille
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ANSWER :
C. Morse code
10.
What was the primary advantage of the telegraph over previous communication methods?
A.
It could transmit messages over long distances instantly.
B.
It required no special training to use.
C.
It was inexpensive to operate.
D.
It used pre-existing infrastructure.
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ANSWER :
A. It could transmit messages over long distances instantly.
11.
Which event was significantly impacted by the use of the telegraph in the United States?
A.
The American Revolution
B.
The Civil War
C.
World War I
D.
The War of 1812
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ANSWER :
B. The Civil War
12.
What was the main challenge in laying the transatlantic telegraph cable?
A.
Depth of the ocean
B.
Weather conditions
C.
Length of the cable
D.
All of the above
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ANSWER :
D. All of the above