Working of a Telegraph - Physics
2:30
YouTubeElearnin
Working of a Telegraph - Physics
TELEGRAPH It is the first modern instrument used in sending messages to a distant place in a very short time. The working of telegraph is made efficient on using Morse code in which each letter is given a code of dots and lines. Important parts of telegraph system are electro magnet (M),battery (B), Morse key (K), and long wire called cable ...
428.8K viewsAug 28, 2012
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