1. What is the primary function of a function generator?
A. To measure voltage
B. To generate various types of electrical waveforms
C. To convert DC to AC
D. To measure frequency
Answer: B. To generate various types of electrical waveforms
2. Which of the following waveforms can typically be generated by a function generator?
A. Sine wave
B. Square wave
C. Triangle wave
D. All of the above
Answer: D. All of the above
3. What is the most common frequency range of a function generator?
A. 0 Hz to 1 MHz
B. 0 Hz to 100 kHz
C. 1 Hz to 100 MHz
D. 10 Hz to 1 GHz
Answer: C. 1 Hz to 100 MHz
4. Which of the following settings on a function generator adjusts the frequency of the output waveform?
A. Amplitude control
B. Offset control
C. Frequency control
D. Waveform selector
Answer: C. Frequency control
5. What is the main use of a function generator in electronics?
A. To measure power
B. To provide a test signal for circuit testing
C. To measure current
D. To power electrical devices
Answer: B. To provide a test signal for circuit testing
6. In a function generator, the ‘offset’ control is used to:
A. Set the frequency of the waveform
B. Adjust the amplitude of the waveform
C. Shift the waveform vertically
D. Change the waveform shape
Answer: C. Shift the waveform vertically
7. A typical function generator can produce which of the following types of waveforms?
A. Sine
B. Square
C. Triangle
D. All of the above
Answer: D. All of the above
8. What is the unit of measurement for the output frequency of a function generator?
A. Volts
B. Amps
C. Hertz (Hz)
D. Seconds
Answer: C. Hertz (Hz)
9. Which of the following types of function generators is often used to generate very high-frequency signals?
A. Arbitrary waveform generator
B. Sweep function generator
C. Pulse function generator
D. Signal analyzer
Answer: A. Arbitrary waveform generator
10. The amplitude of the output waveform from a function generator is controlled by the:
A. Frequency control
B. Offset control
C. Amplitude control
D. Trigger level
Answer: C. Amplitude control
11. The primary purpose of a power supply is to:
A. Convert AC voltage to DC voltage
B. Generate electrical signals
C. Measure voltage and current
D. Stabilize the temperature of a circuit
Answer: A. Convert AC voltage to DC voltage
12. Which of the following is true about a variable power supply?
A. It provides a fixed voltage and current
B. Its output voltage can be adjusted by the user
C. It only provides DC power
D. It is not used in laboratory testing
Answer: B. Its output voltage can be adjusted by the user
13. What does the ‘current limit’ feature of a power supply do?
A. Limits the maximum voltage output
B. Limits the maximum current output to protect the circuit
C. Adjusts the power factor
D. Increases the efficiency of power conversion
Answer: B. Limits the maximum current output to protect the circuit
14. In a laboratory power supply, what does the ‘voltage control’ adjust?
A. The output frequency
B. The output voltage
C. The output current
D. The waveform shape
Answer: B. The output voltage
15. A power supply with multiple output channels can provide:
A. A single voltage and current
B. Different voltage and current values on each channel
C. Only DC voltage
D. A combination of DC and AC power
Answer: B. Different voltage and current values on each channel
16. What is the typical output voltage range for a laboratory power supply?
A. 0V to 10V
B. 0V to 50V
C. 0V to 100V
D. 0V to 30V
Answer: B. 0V to 50V
17. What is the significance of the ‘Ripple’ in a DC power supply?
A. It refers to the fluctuation in the DC output voltage
B. It refers to the speed at which the supply changes output voltage
C. It refers to the amount of output power
D. It indicates the frequency of the supply
Answer: A. It refers to the fluctuation in the DC output voltage
18. The ‘Load regulation’ of a power supply refers to:
A. The variation in output voltage when the load changes
B. The ability of the power supply to maintain constant voltage
C. The power efficiency of the supply
D. The fluctuation in input voltage
Answer: A. The variation in output voltage when the load changes
19. Which of the following is an advantage of a switched-mode power supply (SMPS) over a linear power supply?
A. It is more energy-efficient
B. It is less complex
C. It is easier to design
D. It produces less electrical noise
Answer: A. It is more energy-efficient
20. Which of the following is a typical feature of a power supply with over-voltage protection?
A. The supply increases its output voltage to meet demand
B. The supply will shut off or limit the output voltage if it exceeds a safe level
C. The supply limits the input current to protect components
D. The supply adjusts the output voltage based on the load frequency
Answer: B. The supply will shut off or limit the output voltage if it exceeds a safe level