35. In a time-domain plot, the horizontal axis is a measure of ________.a. Signal amplitudeb. Timec. Frequencyd. PhaseThe correct answer is b

36. If the bandwidth of a signal is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?a. 5 KHzb. 10 KHzc. 47 KHzd. 57 KHzThe correct answer is d

37. Your answer is a

38. What is the bandwidth of a signal that ranges from 40 KHz to 4 MHz?a. 3.96 MHzb. 36 MHzc. 360 KHzd. 396 KHzThe correct answer is a

39. As frequency increases, the period ________.a. Decreasesb. Increasesc. Remains the samed. DoublesThe correct answer is a

40. When propagation speed is multiplied by propagation time, we get the ________.a. Throughputb. Wavelength of the signalc. Distance a signal or bit has traveledd. Distortion factorThe correct answer is c

41. Propagation time is ________ proportional to distance and ________ proportional to propagation speed.a. Inversely; directlyb. Inversely; inverselyc. Directly; inverselyd. Directly; directlyThe correct answer is c

42. Wavelength is ________ proportional to propagation speed and ________ proportional to

period.a. Directly; directlyb. Inversely; directlyc. Directly; inverselyd. Inversely; inverselyThe correct answer is a

43. Which of the following can be determined from a frequency-domain graph of a signal?a. Phaseb. Powerc. Frequencyd. All the aboveThe correct answer is c

44. Which of the following can be determined from a frequency-domain graph of a signal?a. Phaseb. Bandwidthc. Powerd. All the aboveThe correct answer is b

45. In a frequency-domain plot, the vertical axis measures the ________.a. Frequencyb. Peak amplitudec. Phased. SlopeThe correct answer is b

46. Given two sine waves A and B, if the frequency of A is twice that of B, then the period of B is ________ that of A.a. One-halfb. Twicec. The same asd. Indeterminate fromThe correct answer is b

47. The wavelength of green light in air is ________ the wavelength of green light in fiber-optic cable.a. Greater thanb. Less thanc. Equal tod. None of the aboveThe correct answer is b

48. Using the Shannon formula to calculate the data rate for a given channel, if C = B, then ________.a. The signal is equal to the noiseb. The signal is less than the noise

c. The signal is greater than the noised. Not enough information is given to answer the questionThe correct answer is a

49. A sine wave is ________.a. Aperiodic and continuousb. Periodic and discretec. Aperiodic and discreted. Periodic and continuousThe correct answer is d

50. If the maximum amplitude of a sine wave is 2 V, the minimum amplitude is ________ V.a. 2b. 1c. -2d. Between -2 and 2The correct answer is c

51. A signal is measured at two different points. The power is P1 at the first point and P2 at the second point. The dB is 0. This means ________.a. P2 is zerob. P2 equals P1c. P2 is much larger than P1d. P2 is much smaller than P1The correct answer is b