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chapter 14

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6.The phenomena states that the set of equation, including Faraday's Law, Demonstrated that electricity, magnetism, and optics are all manifestation.
8.Used to carry the signal.
3.A device that uses electrical signals to transmit message.
1.Is a France's response to the need for quick and reliable communication in the country over long distance.
2.The optical form of telegraphy uses visual signals.

10.A single device can act both transmitter and receiver.
7.Takes the information to be shared and converts it to a signal in form of electrical or optical signal.
4.Set of pulses, activated by pressing a switch or telegraph.
5.A device that could transmit speech electrically.
9.Receives the signal and converts it back into practical information.

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ELECTROMAGNETICFIELD
TRANSMISSIONMEDIUM
ELECTRICTELEGRAPH
TELEGRAPHSYSTEM
SEMAPHORECODES

TRANSCEIVERS
TRANSMITTER
MORSECODE
TELEPHONE
RECEIVER

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