COEDAD
  • 1. In LTSpice, what command key opens the component browser?
A) F2
B) F3
C) F1
  • 2. Which component value is used for R1 in the initial RC circuit analysis?
A) 1ΚΩ
B) 220k
C) 5k
D) 10ΚΩ
  • 3. Which initial value setting is correct for the pulse source configuration?
A) 5V
B) 1µF
C) 10V
D) 0V
  • 4. What is the proper rise time setting for the pulse source?
A) 1
B) 2ns
C) 3
D) 1ns
  • 5. What is the correct duration for running the transient analysis?
A) 100ms
B) 5ms
C) 10ms
D) 20ms
  • 6. Which analysis command is used for time-domain simulation?
A) .tran
B) .op
C) .meas
D) Pulse
  • 7. What is the proper method to measure capacitor charging time?
A) Using cursor differences in voltage vs. time plot
B) transient analysis
C) None of them
  • 8. Which waveform represents correct capacitor charging behavior?
A) Exponential rise to steady state
B) An exponential decay curve.
C) Exponential rise
  • 9. What determines the RC circuit's time constant?
A) R-C
B) R/C
C) R x C
D) C x R
  • 10. What is the correct starting frequency for AC analysis?
A) 0Hz
B) 1Hz
C) 5Hz
D) -1Hz
  • 11. How many points per decade are specified for frequency analysis?
A) 100
B) 50
C) 10
D) 120
  • 12. What represents the correct stop frequency for AC analysis?
A) Highest frequency
B) 1MHz
C) Low frequency
D) 2MHz
  • 13. Which plot type correctly shows frequency response?
A) gain
B) High frequency
C) Bode plot
D) Frequency
  • 14. What defines the -3dB point in frequency response?
A) Half power point (0.707 of peak amplitude)
B) half of its maximum power.
C) Half point (0.70 of peak amplitude)
  • 15. What is the correct peak voltage for the AC source in rectifier simulation?
A) 220V
B) 170 V peak
C) 12V
D) 120V
  • 16. Which capacitor value is specified for filtering in the power supply?
A) 100μF
B) 10μF
C) 1000μF
D) 2200µF
  • 17. What is the proper diode configuration for full-wave rectification?
A) Bridge configuration with four diodes
B) Bridge configuration with two diodes
C) Bridge rectifier
  • 18. Which measurement technique correctly determines ripple voltage?
A) difference between the maximum and minimm voltage
B) None of them
C) Peak-to-peak voltage measurement
  • 19. What parameter correctly indicates power supply efficiency?
A) Input power x output power
B) Output power / Input power × 100%
C) Input power / output power x 100%
  • 20. What op-amp model is specified for the non-inverting amplifier?
A) LT1001
B) LM741
C) LT101
D) LM1001
  • 21. Which power supply configuration is correct for the op-amp?
A) -15V
B) 5V
C) ±15V
D) 15V
  • 22. What gain setting is specified for the non-inverting amplifier?
A) 11
B) 12
C) 10
D) 13
  • 23. Which input signal is correct for testing the op-amp circuit?
A) 2V sine wave
B) All of the above
C) 1 V peak sine wave
D) 1V sine wave
  • 24. What is the correct method for bandwidth measurement?
A) Bandwidth
B) Frequency at 3dB point from midband gain
C) Frequency at -3dB point from midband gain
D) Sine wave
  • 25. What is the correct input resistor value for the differential amplifier?
A) 10ΚΩ
B) 1ΚΩ
C) 20ΚΩ
D) 120Ω
  • 26. Which parameter correctly measures differential amplifier performance?
A) Low Output Impedance
B) High Input Impedance
C) CMRR
  • 27. What is the proper feedback resistor value for matched differential gain?
A) 1ΚΩ
B) 120
C) 220
D) 10ΚΩ
  • 28. Which configuration best tests common-mode rejection?
A) difference amplifier configuration
B) Apply a common-mode signal
C) Identical signals applied to both inputs
  • 29. What is the correct method for measuring differential gain?
A) Output voltage / differential input voltage
B) Connect the inputs
C) Apply a small differential input Vd=V-V-VdV+ -V
  • 30. What is the specified cutoff frequency for the second-order low-pass filter?
A) 1kHz
B) 10kHz
C) drops by -3dB
D) drops by 3dB
  • 31. Which topology is specified for the active filter implementation?
A) Swollen-key
B) Sallen-Key
C) VCVS filter topology
  • 32. What is the correct phase shift at cutoff frequency?
A) -90 Celsius
B) 80 degrees
C) -120 degrees
D) -90 degrees
  • 33. Which parameter properly indicates filter roll-off rate?
A) -40 dB/decade
B) 4 dB/decade
C) All of the above
D) Filter order (n) or slope in dB/decade
  • 34. What is the correct damping ratio for optimal filter response?
A) 0.770
B) 0707
C) 0.707
D) 0.7777
  • 35. What is the correct input voltage for the regulator circuit?
A) ±15V
B) 5V
C) 15V
D) 12V
  • 36. Which load resistance value is specified for testing?
A) 100Ω
B) 2kΩ
C) 1ΚΩ
  • 37. What is the proper output voltage specification?
A) 5V
B) 15V
C) 120V
D) 12V
  • 38. Which parameter correctly measures load regulation?
A) AIIoad / AVout
B) AVout/Alload
C) Power supply
  • 39. What is the correct method for implementing current limiting?
A) Parallel sense resistor with feedback
B) Power supply
C) Series sense resistor with feedback
  • 40. Which oscillator type is specified in the lab guide?
A) Phase-Shift Oscillator
B) Colpitts Oscillator
C) Clap Oscillator
D) Wien bridge
  • 41. What determines the correct oscillation frequency?
A) RC time constant
B) Period and frequency
C) Frequency-selective componentsi
  • 42. Which component provides proper amplitude stabilization?
A) Use a frequency counter
B) Amplitude stabilizer
C) Use oscilloscope to see how the output frequency changes
D) AGC circuit with thermistor
  • 43. What is the correct method for measuring frequency stability?
A) Use a frequency counter
B) Long-term frequency drift measurement
C) oscilloscope to see how the output frequency changes
  • 44. Which parameter indicates proper oscillator startup?
A) Exponential amplitude growth to steady state
B) Across the resistance
C) Closed loop gain
  • 45. What is the specified switching frequency?
A) 1kHz
B) 100kHz
C) 50KHz
D) 15KHz
  • 46. Which control method is correct for the buck converter?
A) Voltage-Mode Control (VMC)
B) negative feedback control
C) PWM feedback control
  • 47. What is the proper method for measuring efficiency?
A) (Pout/Pin) x 100%
B) (Pin/Pout) x 100%
C) Pout x Pin x 100%
  • 48. Which parameter correctly indicates transient response?
A) Damping ration
B) Output voltage settling time
C) Output voltage not settling time
  • 49. What is the correct inductor value for the buck converter?
A) 100μΗ
B) 1μΗ
C) 10μΗ
D) 1000μΗ
  • 50. Which analysis type properly evaluates component variations?
A) Tolerance Analysis
B) Monte Carlo
C) AC analysis
D) transient analysis
  • 51. What is the correct method for creating custom components?
A) Using . Meas command
B) CAD
C) Using Netlist
D) Using.subckt definition
  • 52. Which command generates proper performance reports?
A) .op
B) .meas
C) .tran
D) .param
  • 53. What is the correct format for exporting netlists?
A) Plain Text
B) SPICE compatible text format
C) SPICE compatible image format
  • 54. Which approach correctly implements hierarchical designs?
A) Top down design
B) Visual hierarchy
C) Symbol creation with subcircuits
D) All of the above
  • 55. What is the correct simulation resolution setting?
A) Minimum timestep = 100 of smallest time constant
B) Maximum timestep = 1/100 of Highest time constant
C) Maximum timestep = 1/100 of smallest time constant
  • 56. Which convergence setting is proper for complex circuits?
A) min= 1e-9
B) .options
C) min= 1-9
D) gmin=1e
E) gmin = 1e-9
  • 57. What is the correct method for setting initial conditions?
A) .param
B) .TRAN
C) .step
D) .ic command with node voltages
  • 58. Which parameter properly controls simulation accuracy?
A) Reltol
B) abstol 1e-12
C) abstol
D) Reltol 1e-12
  • 59. What is the correct approach for handling convergence issues?
A) Reduce increment size
B) Modify gmin stepping
C) Tighten Convergence Settings
D) Refine the mesh
  • 60. Which method correctly exports waveform data?
A) Left-click plot, export data as text
B) Right-click plot, export data as text
C) File Export command from the Plot Pane
  • 61. What is the proper format for measurement expressions?
A) Node2
B) V(node1)-V(node2)
C) node1
D) .MEAS
  • 62. Which command correctly calculates RMS values?
A) .op
B) .tran
C) .param
D) .meas tran rms RMS V(out)
  • 63. What is the correct method for frequency domain analysis?
A) .fft V(out)
B) .AC
C) .tran
D) .op
  • 64. Which approach properly analyzes power dissipation?
A) .MEAS P_AVG AVG V(R1)*I(R1)
B) .meas avg power = avg (V(n1)*I(R1))
C) .AC
D) .param
E) .tran
  • 65. What is the correct method for component labeling?
A) Prefix with functional description
B) Press F4 or the “label net"
C) Hierarchical prefix with functional description
D) Comment Text for descriptive labels and Net Name Labels/Ports
  • 66. Which approach properly documents simulation settings?
A) Add comments
B) SPICE directives with comments
C) Rename the schematic
D) using a text file to document
  • 67. What is the correct file organization structure?
A) Dedicated folder for each individual circuit project
B) Separate folders for each analysis type
C) My Documents\LTspiceXVII
  • 68. Which naming convention is proper for simulation files?
A) .measure
B) Clarity, functionality, and portability
C) ProjectName_CircuitType_Version
  • 69. What is the correct method for version control?
A) External Version Control System (VCS)
B) use the .step param command
C) Sequential backup with date stamps
  • 70. Which approach correctly verifies circuit operation?
A) Verification vs. Validation
B) Systematic, multi-analysis comparison
C) Systematic node voltage checking
  • 71. What is the proper method for identifying simulation errors?
A) SPICE Error Log and the Waveform Viewer
B) Check for syntax and units
C) Error log analysis and stepping
  • 72. Which technique correctly validates results?
A) Cross-Verification
B) Theoretical calculation comparison
  • 73. What is the correct approach for debugging convergence issues?
A) Systematic process
B) Progressive component addition
  • 74. Which method properly verifies model accuracy?
A) Comparison with datasheet specifications
B) Comparison of simulation results against unknown datasheet parameters
  • 75. What is the correct capacitor value specified for the transient analysis task?
A) 1uF
B) 1000uF
C) 100uF
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