ECEN118-FinalExam

Which of the following is NOT a mode of electronic communication?

• Radio
• Television
• Telegraph
• Smoke signals

What is the primary advantage of electronic communication over traditional communication methods?

• Slower transmission
• Lack of privacy
• Wider reach
• Limited content

In electronic communication, what does "EM" stand for?

• Electromagnetic
• Electrical Mechanism
• Electronic Message
• Efficient Method

Which of the following is an example of wireless communication?

• Telephone
• Telegraph
• Smoke signals
• Cell phone

What is the electromagnetic spectrum?

• A graph displaying voltage levels in communication circuits
• A model of the Earth's magnetic field
• The range of all possible frequencies of electromagnetic radiation
• A measure of the electrical resistance in a circuit

Which of the following is not part of the electromagnetic spectrum?

• X-rays
• Infrared radiation
• Sound waves
• Gamma rays

In the electromagnetic spectrum, which type of wave has the highest frequency?

• Radio waves
• Microwaves
• Infrared radiation
• Gamma rays

Amplitude modulation (AM) is primarily used for which type of communication?

• Television
• Voice and music transmission
• Data transmission
• Satellite communication

In amplitude modulation, what does the amplitude of the carrier signal represent?

• The information being transmitted
• The frequency of the signal
• The time of transmission
• The modulation index

What is the key disadvantage of amplitude modulation (AM) for communication?

• It is highly resistant to interference
• It requires a very narrow bandwidth
• It is prone to noise and interference
• It is too expensive to implement