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Electronics Worksheet: Electronic Components

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

Answer key

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

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