NS2-M3C21 - Electronics Quiz 60

Which of the following is an example of a mechanical wave? (Input all that apply, then push the ENTER button.)

• ocean waves

• sound waves

• light waves

• none of the above

Choose the answer that corrects the statement. Visible light waves are at the upper end of the frequency spectrum, while x-ray waves fall at the lower end.

• 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? (Input all that apply, then push the ENTER button.)

• trapping

• retraction

• diffraction

• none of 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 echo in 0.6 seconds. Who is closer to the cliff?

• Jackson

• Pember

• They are the same distance.

Choose the answers to correct the statement. (Input all that apply, then push the ENTER button.) Electronic warfare includes three major subdivisions: Electronic Awareness (EA); Evaluative Protection (EP); Electronic Warfare Support (ES)

• Change “Awareness” to “Attack”

• Change “ES” to “EWS”

• Change “Electronic” to “Evaluative”

• Change “Evaluative” to “Electronic”

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