Health, 21.01.2021 07:30 villafana36

A telegraph uses an electric circuit to send a message. When the telegraph operator presses on the device, the circuit switch is on, and when the device is released, the circuit is turned off. How is the technology to send a telegraph like modern digital technology?
The telegraph sends information as a continuous wave.

The telegraph uses the standard alphabet to send information.

The telegraph sends information as a series of pulses.

The telegraph uses sound waves to transfer information.

A telegraph uses an electric circuit to send a message. When the telegraph operator presses on the

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A telegraph uses an electric circuit to send a message. When the telegraph operator presses on the d...