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Principles of Communication: Basic Concepts Quiz

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Principles of Communication: Basic Concepts Quiz

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Questions and Answers

Which of the following is not true about AM?

The carrier frequency remains constant. (correct)

The information signal amplitude changes the carrier amplitude.

The carrier amplitude varies.

The carrier frequency changes.

The outline of the peaks of a carrier has the shape of the modulating signal and is called the ____.

Envelope (correct)

Carrier Variation

Trace

Waveshape

A carrier of 880 kHz is modulated by a 3.5-kHz sine wave. The LSB and USB are respectively, ____.

887 and 873 kHz

876.5 and 883.5 kHz

883.5 and 876.5 kHz (correct)

873 and 887 kHz

An AM signal has a carrier power of 5W. The Percentage of modulation is 80 percent. The total sideband power is __.

1.6 W Signup and view all the answers

What is the function of an antenna in communication?

To convert current and voltage into electromagnetic waves and vice versa Signup and view all the answers

Which method of communication involves the transmission of signals through a medium such as a transmission line or fiber optics cable?

Wired communication Signup and view all the answers

What is the primary difference between wired and wireless communication?

Wired communication uses physical medium, while wireless communication does not Signup and view all the answers

In the context of communication, what does 'modulation' refer to?

The process of altering a carrier signal according to the information being transmitted Signup and view all the answers

What does the symbol 𝜆 represent in the context of communication?

Wavelength Signup and view all the answers

What is the role of transmission line or fiber optics cable in wired communication?

To provide a physical medium for signal transmission Signup and view all the answers