Name:

Quiz 3

Regarding Reading 3.

1. How did early bi-directional telegraph systems save wire? (By using a...)
2. Once you have a ___________ (question 1), you can replace it with... what?
3. Regarding the telegraph, what mental paradigm did Samuel Morse have to overcome before he could envision Morse code?
4. In a nutshell, what is a relay? Draw a simple relay with a short explanation about how it works.