NS2 Quiz 20 - Basic Electronics

Which of the following is an example of a mechanical wave?

• microwave

• sound wave

• light wave

• none from the above

Visible light waves are at the upper end of the frequency spectrum, while x-ray waves fall at the lower end.

       

• A Change “visible light” to “audible”

• Change “x-ray” to “audible”

• Change “upper” to “lower

• All of the above are correct

Which of the following are types of wave variations?

• trapping

• retraction

• crest

• none from the above

A device for determining the presence and location of an object by measuring the time for

         the echo of a radio wave to return from it and the direction from which it returns

• radar

• carrier wave

• trapping

• hertz

To cause the amplitude, frequency, phase, or intensity of a carrier wave to vary in

         accordance with a sound wave or other signal, the frequency of the signal wave usually

          being very much lower than that of the carrier

• modification

• modulation

• metamorphosis

• multiplexing

Jackson and Pember are standing at different distances from a cliff. They both shout. Jackson hears his echo in 6 thousandths of a second. Pember hears his Who is closer to the cliff?

• Jackson

• Pember

• they are at the same distance

Electronic warfare includes three major subdivisions: Electronic Awareness (EA);

          Electronic Protection (EP); Electronic Warfare Support (ES)

• Change “Awareness” to “Attack”

• Change “ES” to “EWS

• Change “Electronic” to “Evaluative”

• Change “Evaluative” to “Electric”

A device that uses radio waves over a networked area and is served through a base station at a fixed location

• Cell phone

• Electronic warfare

• Radar

• Sonar

That division of electronic warfare involving actions to search for, intercept, identify, and

         locate sources of intentional and unintentional radiated electromagnetic

         energy, for the purposes of threat recognition, targeting, planning, and conduct of future

          operations

• ES

• EA

• EW

• EP

The number of cycles of an electromagnetic wave repeated during one second of time is known as what?

• its wavelength

• its frequency

• its cycle

• its amplitude