1.Acoustic signals cannot propagate over conductive wire like electrical signals can. However, acoustic signals can propagate in the atmosphere, and can therefore be captured (i.e., received) by RF antennas.

True

False

2.Power density from a transmitting antenna is dependent upon the distance from the antenna. Power density decreases as distance increases.

True

False

3.A signal has a frequency range from 300MHz to 1GHz. What is the frequency bandwidth in Hz?

a. 1300E6 Hz

b. 700 GHz

c. 700E6 Hz

d. 130 MHz

4.Transducers are used to convert one form of signal energy into another form of signal energy. A microphone is an example of a transducer.

True

False

5.Modulation allows us to transmit baseband signals at higher carrier frequencies.

True

False

6.In unguided medium (free space), the electromagnetic (EM) signal wave spreads as it leaves the transmit antenna. Since the power of the EM signal resides at the surface area of the wave front, signal power is described as signal power density (i.e., watts per area). As the signal propagates away from the transmitter, power density decreases, and attenuation is experienced.

True

False