fmixss
  • 1. In a time domain plot, the horizontal axis is a measure of
A) Frequency
B) Peak amplitude
C) Wave length
D) Time
  • 2. The number of bits required to store, or transmit, 1 s of that signal.
A) Bps
B) Digital signal
C) Bit rate
D) Baud rate
  • 3. It combines multiple simple signals into a single, more complex signal.
A) Composite signal
B) Waveforms
C) Harmonic
D) No answer
  • 4. What is the bit rate of a signal in which 10 bit last 2 picoseconds?
A) 5 gigabits
B) 5 petabits
C) 5 terabits
  • 5. Has the function of amplifying and switching electrical signals.
A) Transistor
B) Composite signals
C) Diode
  • 6. Which of the following can be determined from a frequency-domain graph of a signal?
A) Bandwidth
B) Power
C) Time
D) Phase
  • 7. What is the bandwidth of a signal that ranges from 40kHz to 4MHz?
A) 360MHz
B) 396kHz
C) 3.96MHz
  • 8. is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.
A) Capture effect
B) Attenuation
C) Crosstalk
  • 9. A is a two-terminal electronic component that conducts electric current.
A) Ics
B) Diode
C) Composite signal
  • 10. This part involves the conversion of an electronic signal into a physical form that can be perceived by the device.
A) Output transducer
B) Encoder
C) Input transducer
  • 11. A measurement of where a wave is in its cycle, relative to a reference point.
A) Phase
B) Wavelength
C) No answer
  • 12. A sine wave is
A) Kapagod yan
B) Periodic and discrete
C) Periodic and continuous
  • 13. This is the midway component in the system that helps to pass the signal from the transmitter end to the receiver end.
A) User
B) Channel
C) Sender
  • 14. The branch of science and engineering that deals with the study and application of devices and systems that control the flow of electrons, primarily for information processing and control.
A) Physics
B) Biometrics
C) Electronics
  • 15. A/An_is a type of electronic test instrument that graphically displays varying voltages of one or more signals as a function of time.
A) Amplifier
B) Transponder
C) Oscilloscope
  • 16. A compact assembly of electronic circuits formed from various electronic components such as transistors, resistors, and capacitors and their interconnections.
A) Transducer
B) ICs
C) Amplifier
  • 17. The process of encoding a signal using its amplitude, frequency, or phase is known as.
A) Digital modulation
B) Analog modulation
C) Bahala ka
  • 18. The_____ has units of bits/second
A) Yes
B) No
C) Throughout
  • 19. As frequency increases, the period_____
A) Both?
B) Increases
C) Decreases
  • 20. What is the bit rate of a signal in which 1 bit last 2 milliseconds?
A) 50bits
B) 5000bits
C) 500bits
  • 21. Data is transferred in bits.
A) ASK
B) Choose wisely
C) PSK
  • 22. It uses analog signals for data transmission.
A) Bahala ka
B) Digital modulation
C) Analog modulation
  • 23. The___ has units of seconds.
A) Period
B) Frequent
C) Throughout
  • 24. A type of harmonic wave that moves in a periodic manner.
A) Digital signal
B) Frequency
C) Sine wave
  • 25. Is a type of transmission impairment in which an outside source such as crosstalk that corrupts a signal.
A) Distortion
B) Reflection
C) Noise
  • 26. is a type of a transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal.
A) Decibel
B) Distortion
C) Crosstalk
  • 27. In a frequency-domain plot, the vertical axis measures the
A) Phase
B) Wavelength
C) Peak amplitude
  • 28. A device that converts a physical phenomenon (like sound, light, temperature, etc.) into an electrical signal.
A) Channel
B) Amplifier
C) Transducer
  • 29. What is the duration of 1 bit for a signal with a bit rate of 5 Mbps?
A) 0.000002 milliseconds
B) 0.000002 seconds
C) 0.002 seconds
  • 30. What is the duration of 1 bit for a signal with a bit rate of 100 bps?
A) 0.01 seconds
B) 0.001 seconds
C) 0.01 milliseconds
  • 31. Which of the following configurations provides phase inversion?
A) non-inverting amplifier
B) inverting amplifier
C) voltage follower
D) differential amplifier
  • 32. The sampling theorem is also known as
A) Nyquist theorem
B) Kirchhoff's theorem
C) Fourier theorem
D) Ohm's law
  • 33. The disadvantage of flash ADCs is
A) large number of comparators required
B) slow operation
C) low accuracy
D) high quantization error
  • 34. The process of converting an analog signal into a digital signal is called
A) demodulation
B) analog-to-digital Conversion
C) modulation
D) digital-to-analog Conversion
  • 35. Quantization in ADC means
A) encoding binary data
B) filtering the analog signal
C) sampling the signal in time
D) converting each sample into discrete amplitude levels
  • 36. Which op-amp circuit provides difference between two input voltages?
A) comparator
B) differential amplifier
C) integrator
D) summing amplifier
  • 37. The main advantage of a flash ADC is
A) low cost
B) low power consumption
C) very high speed
D) simplicity
  • 38. The purpose of a sample-and-hold circuit in ADC is to
A) hold the input signal constant during conversion
B) remove high-frequency noise
C) generate clock pulses
D) remove high-frequency noise
  • 39. A successive approximation ADC works by
A) integrating input voltage over time
B) comparing input voltage with reference voltages step-by-step
C) sampling only at zero crossings
D) counting clock pulses during conversion
  • 40. The step size in an ADC determines
A) quantization error
B) resolution speed
C) output current
D) sampling frequency
  • 41. Sampling involves
A) dividing the signal into equal voltage levels
B) taking discrete time samples of a continuous signal
C) converting binary to decimal
D) filtering unwanted frequencies
  • 42. The ideal operational amplifier has which of the following characteristics?
A) both input and output impedances are infinite
B) zero input impedance and infinite output impedance
C) infinite input impedance and zero output impedance
D) both input and output impedances are zero
  • 43. Which terminal of the op-amp is marked with a minus (-) sign?
A) ground terminal
B) non-inverting input
C) output terminal
D) inverting input
  • 44. The ADC output is in
A) sinusoidal waveform
B) binary form
C) current form
D) analog voltage
  • 45. The symbol "+" on an op-amp indicates:
A) the positive output voltage
B) the positive supply voltage
C) the non-inverting input terminal
D) the feedback terminal
  • 46. Common-mode rejection ratio (CMRR) of an op-amp should ideally be
A) very high
B) very small
C) Zero
D) one
  • 47. The purpose of negative feedback in an op-amp is to
A) increase gain
B) increase input impedance
C) reduce distortion and stabilize gain
D) reduce bandwidth
  • 48. Quantization error is the
A) ratio of signal to noise
B) sum of all sampled values
C) sampling frequency error
D) difference between actual and quantized value
  • 49. According to the Nyquist theorem, the sampling rate must be at least
A) four times the signal frequency
B) twice the highest signal frequency
C) half the signal frequency
D) equal to the signal frequency
  • 50. The first step in analog-to-digital conversion.
A) quantization
B) encoding
C) sampling
D) filtering
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