Unit 1: The Electronics Expedition - Practice Quiz

1 Which component is commonly used to limit the flow of electric current?

2 Which component stores electrical energy in an electric field?

3 What is the main function of a diode in a simple circuit?

4 What does LED stand for?

5 Which component is commonly used as an electronic switch or amplifier?

6 What is the purpose of a fuse in an electronic circuit?

7 Which component is designed to store energy in a magnetic field?

8 What is an integrated circuit, commonly called an IC?

9 What is the main purpose of a digital trainer module?

10 Which source on a digital trainer is commonly used to provide logic 0 or logic 1 inputs?

11 Which indicator on a digital trainer commonly shows the state of a logic signal?

12 What is the function of a regulated power supply in a digital trainer?

13 Which device on a digital trainer can provide regularly repeating digital pulses?

14 What does a common seven-segment display show?

15 Which instrument can generate a sine wave for testing an electronic circuit?

16 Which source provides a constant electrical voltage for a circuit?

17 Which device converts sound waves into an electrical signal?

18 Which device converts an electrical signal into sound?

19 Which instrument is used to observe the waveform of an electrical signal?

20 Which display device uses liquid crystals to show information?

21 A resistor with color bands brown, black, and red has an approximate resistance of:

22 A circuit requires a supply and a component must be limited to . What resistor value is closest for a simple series connection when the component drop is negligible?

23 Which component is most suitable for allowing current in one direction while blocking it in the opposite direction?

24 An electrolytic capacitor is connected directly across a DC supply. Which practice is essential?

25 In a transistor used as an electronic switch, the transistor is intended to operate mainly in which two regions?

26 A fuse is placed in series with the supply of an electronic circuit primarily to:

27 Which component is commonly used to vary resistance manually in order to adjust voltage or signal level?

28 Before connecting an IC on a digital trainer module, the safest first action is to:

29 A digital trainer's logic switch is connected to an IC input. What is its main purpose?

30 If a trainer module's logic probe indicates a high state at an output, the output voltage is generally:

31 A seven-segment display on a trainer module shows an incorrect digit even though the logic inputs appear correct. Which check is most relevant first?

32 What is the main function of a clock generator on a digital trainer module?

33 A digital IC input is left unconnected on a trainer module. Why can this cause unreliable operation?

34 When testing a logic circuit on a trainer, why should the circuit ground and instrument ground be connected properly?

35 A function generator is connected to an amplifier input. Which setting determines how large the applied signal is?

36 A sine wave displayed on an oscilloscope occupies four vertical divisions. If the vertical scale is , what is the peak-to-peak voltage?

37 An oscilloscope shows five complete cycles across ten horizontal divisions. If the time scale is , what is the approximate frequency?

38 Which input device changes its resistance significantly in response to incident light and can be used in a light-sensing circuit?

39 A microphone is connected to an electronic circuit as an input source. It primarily converts:

40 Which display device is most appropriate when a circuit must indicate the ON or OFF state of a digital output immediately?

41 A resistor has the color bands brown, black, orange, and gold. During measurement with a multimeter, the value appears close to . Which conclusion is most appropriate?

42 A capacitor marked is connected to a circuit. Which interpretation is correct?

43 A polarized electrolytic capacitor is installed across a DC supply with its negative terminal connected to the positive rail. What is the most likely consequence?

44 An LED and a resistor are connected in series to a supply. Assuming an LED forward drop of , which current is closest to the expected value?

45 A diode is tested using a digital multimeter in diode mode. It reads approximately in one direction and displays an open-circuit indication in the other. What does this most strongly indicate?

46 A transistor's data sheet identifies its terminals as , , and , but the physical package orientation is unknown. Which method is safest for identifying the terminals before circuit connection?

47 A Zener diode is connected in reverse bias with a suitable series resistor. The supply is increased from to . Which behavior is expected if the current remains within its rated limits?

48 A pushbutton input to a digital circuit changes unpredictably between logic states when pressed. Which component arrangement most directly addresses the problem?

49 Two resistors are marked and . Which connection produces an equivalent resistance of approximately ?

50 Before wiring a digital trainer circuit, the supply is set to the required voltage. Which additional practice best reduces the risk of damaging an integrated circuit?

51 A logic trainer's LED output indicator remains off when the measured output voltage is . Which diagnosis is most reasonable?

52 A digital trainer provides a clock generator and a manual pulse switch. A counter advances several times for one manual press. What is the most likely cause?

53 A trainer module contains several unused inputs on a logic gate IC. Why should these inputs generally be assigned a defined logic level?

54 A trainer uses a common-ground digital supply. An oscilloscope probe is connected with its ground clip to a signal point rather than circuit ground. What is the primary risk?

55 A logic trainer's regulated output is correct with no load but drops significantly when an IC circuit is connected. Which check should be performed first?

56 A function generator is set to produce a sine wave with a DC offset. What are the maximum and minimum voltages relative to ground?

57 A function generator has a output and is connected to a high-impedance oscilloscope input. The generator display is calibrated for a load. What reading will commonly appear on the oscilloscope?

58 An oscilloscope displays a stable waveform only when its trigger level is set near the waveform's midpoint. What does this setting primarily control?

59 A seven-segment display is connected to a decoder whose outputs are active-low. The display segments illuminate only when their cathodes are driven low. Which display type is compatible?

60 A digital circuit drives an LED directly from a logic output. The LED is brighter than expected and the IC becomes warm. Which change is most appropriate?