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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 524 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  2. 2.True or false: a buzzer makes a beeping sound. (a) True (b) False
  3. 3.🧩 Which component senses how bright it is? (a) capacitor (b) diode (c) fuse (d) LDR
  4. 4.🧩 Which component has coloured bands? (a) transistor (b) potentiometer (c) LDR (d) resistor
  5. 5.What does an LED do? (a) is a resistance knob (b) beeps for an alarm (c) makes things spin (d) glows using little power
  6. 6.What does a thermistor do? (a) senses how hot it is (b) lets current go one way (c) makes a beeping sound (d) smooths a wobbly supply
  7. 7.True or false: a diode smooths a wobbly supply. (a) False (b) True
  8. 8.True or false: a transistor boosts a small signal. (a) True (b) False
  9. 9.What does an LDR do? (a) boosts a small signal (b) is a resistance knob (c) glows using little power (d) senses how bright it is
  10. 10.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  11. 11.What does a capacitor do? (a) makes things spin (b) has coloured bands (c) stores a little charge (d) glows using little power
  12. 12.What does a diode do? (a) boosts a small signal (b) is a resistance knob (c) lets current go one way (d) beeps for an alarm
  13. 13.🧩 Which component makes things spin? (a) diode (b) LED (c) motor (d) transistor
  14. 14.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  15. 15.🧩 Which component senses how hot it is? (a) LDR (b) transistor (c) thermistor (d) fuse
  16. 16.🧩 Which component limits the current? (a) resistor (b) fuse (c) transistor (d) LDR
  17. 17.What does a transistor do? (a) boosts a small signal (b) makes a beeping sound (c) has coloured bands (d) stores a little charge
  18. 18.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) LED (d) resistor
  19. 19.True or false: an LDR makes a beeping sound. (a) True (b) False
  20. 20.What does a buzzer do? (a) senses how bright it is (b) smooths a wobbly supply (c) beeps for an alarm (d) has coloured bands
  21. 21.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  22. 22.What does a motor do? (a) boosts a small signal (b) limits the current (c) has coloured bands (d) makes things spin
  23. 23.True or false: a resistor has coloured bands. (a) False (b) True
  24. 24.What does a motor do? (a) limits the current (b) stores a little charge (c) turns a fan or wheels (d) beeps for an alarm
  25. 25.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) potentiometer (d) thermistor
  26. 26.🧩 Which component stores a little charge? (a) diode (b) motor (c) capacitor (d) LDR
  27. 27.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  28. 28.What does a fuse do? (a) is a resistance knob (b) blows if current is high (c) makes things spin (d) senses how hot it is
  29. 29.True or false: a resistor limits the current. (a) False (b) True
  30. 30.True or false: a diode lets current go one way. (a) True (b) False
  31. 31.🧩 Which component glows using little power? (a) motor (b) thermistor (c) LED (d) buzzer
  32. 32.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  33. 33.True or false: a buzzer beeps for an alarm. (a) True (b) False
  34. 34.True or false: a fuse lets current go one way. (a) True (b) False
  35. 35.What does a buzzer do? (a) makes a beeping sound (b) senses how hot it is (c) limits the current (d) boosts a small signal
  36. 36.True or false: a buzzer boosts a small signal. (a) False (b) True
  37. 37.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) resistor (d) LED
  38. 38.What does a capacitor do? (a) smooths a wobbly supply (b) lets current go one way (c) blows if current is high (d) glows using little power
  39. 39.🧩 Which component turns a fan or wheels? (a) transistor (b) motor (c) fuse (d) LDR
  40. 40.True or false: a potentiometer glows using little power. (a) True (b) False

Answer key

  1. a motor
  2. True
  3. LDR
  4. resistor
  5. glows using little power
  6. senses how hot it is
  7. False
  8. True
  9. senses how bright it is
  10. False
  11. stores a little charge
  12. lets current go one way
  13. motor
  14. store charge briefly
  15. thermistor
  16. resistor
  17. boosts a small signal
  18. transistor
  19. False
  20. beeps for an alarm
  21. a buzzer
  22. makes things spin
  23. True
  24. turns a fan or wheels
  25. capacitor
  26. capacitor
  27. True
  28. blows if current is high
  29. True
  30. True
  31. LED
  32. False
  33. True
  34. False
  35. makes a beeping sound
  36. False
  37. potentiometer
  38. smooths a wobbly supply
  39. motor
  40. False

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