07_INTRODUCTION TO ELEC COM_PART 2

Question 1

Answer 1

Question 2

Answer 2

Question 3

What is a transmitter

Answer 3

Question 4

What is a channel or medium

Answer 4

Question 5

What is a receiver

Answer 5

Question 6

What are the limitations of electronic communications

Answer 6

noise and bandwidth

Question 7

is any unwanted form of energy that tends to interfere with proper and easy reception and reproduction of desired signals

Answer 7

Noise

Question 8

is the portion of the electromagnetic spectrum occupied by a signal

Answer 8

bandwidth

Question 9

What are the modes of transmission

Answer 9

Question 10

transmission is only in one direction

Answer 10

simplex transmission

Question 11

transmission is in either direction but not simultaneously

Answer 11

Half duplex transmission

Question 12

transmission in both directions simultaneously

Answer 12

full duplex transmission

Question 13

Electromagnetic Spectrum from longest wavelength to shortest

Answer 13

R-M-I-V-U-X-G

Question 14

BAND 2 to BAND 11

Answer 14

Question 15

BAND 12 to BAND 19

Answer 15

Question 16

Answer 16

Question 17

Answer 17

Extreme Low Frequencies (30 -300 Hz)

Question 18

Answer 18

Voice Frequencies (300 - 3000 Hz)

Question 19

Answer 19

Low Frequencies (30-300 kHz)

Question 19

Answer 19

Very Low Frequencies (3-30 kHz)

Question 20

Answer 20

Medium Frequencies (300-3000 kHz)

Question 21

Answer 21

High Frequencies (3-30 Mhz)

Question 22

Answer 22

Very High Frequencies (30 - 300 MHz)

Question 23

Answer 23

Ultra High Frequencies (300 - 3000 MHz)

Question 24

Answer 24

Super High Frequencies (3 - 30 GHz)

Question 25

Answer 25

Extremely High Frequencies (30 - 300 GHz)

Question 25

Answer 25

Infrared (0.3 - 300 THz)

Question 26

Answer 26

Visible Spectrum (0.3 - 3 PHz)

Question 26

Equation of Wavelength

Answer 26

Question 27

is the length that one cycle of an electromagnetic wave occupies in space

Answer 27

Wavelength

Question 28

First long-distance communication method. Utilized in various cultures for signaling danger. Can transmit messages across significant distances, such as 750 km.

Answer 28

Smoke Signals

Question 29

Utilized for long-distance messaging due to their homing ability. Used by various civilizations, including during World War I.

Answer 29

Pigeons

Question 30

A mail service using horseback relay for messages and packages in the 19th Century.

Answer 30

Pony Express

Question 31

Used visual signals for maritime communication.

Answer 31

Semaphore Flags

Question 32

Major breakthrough as electric telegraphy emerged in the late 19th Century. Morse code became a global communication method.

Answer 32

Telegraph

Question 33

Evolved from the understanding of electromagnetic waves, leading to military and commercial applications in the 20th Century.

Answer 33

Radio

Question 34

Invented by Alexander Graham Bell in 1876; revolutionized real-time communication. Development of public switch telephone networks post-World War

Answer 34

Telephone

Question 35

Answer 35