EMAGS FINALS 2

Question 1

Electric Permittivity parallel to

Answer 1

Magnetic Permeability

Question 2

Electric Charges parallel to

Answer 2

Magnetic Poles

Question 3

• Positive & Negative
• Can exist separately as purely positive and purely negative charge
  Like – Repel, Unlike - Attract

Answer 3

Electric Charges

Question 4

• North & South
• One found in each magnet’s end. Monopoles does not exists.
  Like – Repel, Unlike - Attract

Answer 4

Magnetic Poles

Question 5

Electric Fields is proportional to

Answer 5

Magnetic Fields

Question 6

Electric Flux is proportional to

Answer 6

Magnetic Flux

Question 7

Electric Force is proportional to

Answer 7

Magnetic Force

Question 8

Refers to the physical means of sending (and receiving) signal information from source to destination.

Answer 8

Transmission Media

Question 9

It is the most important part of the communications system as it is the component that links the source to the destination.

Answer 9

Transmission Media

Question 10

Generally, refers to signals that are of EM origins.

Answer 10

Electromagnetic (EM) Signals

Question 11

These are signals above 20kHz frequency.

Answer 11

Electromagnetic (EM) Signals

Question 12

These include broadcast and telecommunication signals, infrared, visible light, ultraviolet, x-rays and gamma rays.

Answer 12

Electromagnetic (EM) Signals

Question 13

The variety and applications of these signals is essential to our modern society for our survival and comfort.

Answer 13

Electromagnetic (EM) Signals

Question 14

Applications of EM signals today are for _______________; which includes the internet and cellular networks, and in the _____________, which include x-rays, MRI’s, ultrasound and medical procedures using EM waves.

Answer 14

Telecommunications, Medical Field

Question 15

3 Forms of Transmission Media

Answer 15

1. Wired
2. Wireless
3. Hybrid Form: Wire + Wireless

Question 16

These media are usually solid linear conductors that physically connect the transmit and received signals.

Answer 16

Wired

Question 17

_______ media has the limitation of distance but has a better reliability due to the visible physical connection and less susceptive to atmospheric noise being insulated.

Answer 17

Wired

Question 18

Real world examples of wired media are:

Answer 18

landline wires,
coaxial cables,
ethernet (LAN) cables and
fiber optic cables.

Question 19

These media have no material boundaries due to being NOT solid.

Answer 19

Wireless

Question 20

These are designed for short or longer distances as depending on the magnitude of the input power that sustains it.

Answer 20

Wireless

Question 21

Wireless transmission can be ________ to interference due to being ______ to the elements.

Answer 21

susceptive, open

Question 22

The convenience of no physical restrictions due to the nature of this media, is its main draw.

Answer 22

Wireless

Question 23

Wireless real world examples are:

Answer 23

Wifi,
Infrared,
Microwave Radio,
Satellite,
Bluetooth,
Free-to-Air Broadcast (AM/FM/DTV),

Question 24

In practice, there is going to be a hybrid form of transmission media, wherein some sections are wired and some are wireless.

Answer 24

Hybrid Form: Wire + Wireless

Question 25

Those that transverse long distances are usually wired and as it approaches the user or receiver side becomes wireless.

Answer 25

Hybrid Form: Wire + Wireless

Question 26

In some cases, it can also be reversed, in such that at the transmission media was wireless and at the user side it became wired.

Answer 26

Hybrid Form: Wire + Wireless

Question 27

is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner.

Answer 27

Transmission Line

Question 28

The term applies when the conductors are long enough that the wave nature of the transmission must be considered.

Answer 28

Transmission Line

Question 29

It has a center conductor covered with an insulator, then braided or solid outer conductor, and then insulation.

Answer 29

Coaxial

Question 30

Transmission Lines two possible models:

Answer 30

1. T-Model 2. Pi-Model

Question 31

The equivalent impedances form a “T” shaped circuit between the source and load

Answer 31

T-Model

Question 32

The equivalent impedances form a “π” or pi shaped circuit between the source and load

Answer 32

Pi-Model