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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 170 · 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) a motor (b) a fuse (c) a resistor (d) an LED
  2. 2.True or false: a buzzer senses how bright it is. (a) True (b) False
  3. 3.What does a fuse do? (a) boosts a small signal (b) lets current go one way (c) blows if current is high (d) has coloured bands
  4. 4.What does an LDR do? (a) senses how bright it is (b) limits the current (c) beeps for an alarm (d) turns a fan or wheels
  5. 5.True or false: an LDR glows using little power. (a) False (b) True
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  7. 7.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) capacitor (d) LDR
  8. 8.What does a transistor do? (a) is a resistance knob (b) senses how hot it is (c) lets current go one way (d) boosts a small signal
  9. 9.What does a capacitor do? (a) stores a little charge (b) limits the current (c) is a resistance knob (d) makes things spin
  10. 10.What does an LED do? (a) is a resistance knob (b) stores a little charge (c) blows if current is high (d) glows using little power
  11. 11.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) motor (d) transistor
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  13. 13.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  14. 14.True or false: a motor makes things spin. (a) False (b) True
  15. 15.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) makes a beeping sound (d) has coloured bands
  16. 16.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) diode (d) LED
  17. 17.What does a buzzer do? (a) blows if current is high (b) makes a beeping sound (c) boosts a small signal (d) smooths a wobbly supply
  18. 18.What does a thermistor do? (a) has coloured bands (b) smooths a wobbly supply (c) senses how hot it is (d) limits the current
  19. 19.True or false: a buzzer stores a little charge. (a) True (b) False
  20. 20.True or false: a motor has coloured bands. (a) False (b) True
  21. 21.🧩 Which component boosts a small signal? (a) buzzer (b) resistor (c) capacitor (d) transistor
  22. 22.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) smooths a wobbly supply (d) limits the current
  23. 23.True or false: an LDR has coloured bands. (a) True (b) False
  24. 24.🧩 Which component limits the current? (a) resistor (b) buzzer (c) capacitor (d) transistor
  25. 25.🧩 Which component lets current go one way? (a) capacitor (b) fuse (c) thermistor (d) diode
  26. 26.True or false: a fuse blows if current is high. (a) True (b) False
  27. 27.True or false: a capacitor blows if current is high. (a) False (b) True
  28. 28.What does a resistor do? (a) blows if current is high (b) boosts a small signal (c) limits the current (d) lets current go one way
  29. 29.🧩 Which component has coloured bands? (a) diode (b) LDR (c) thermistor (d) resistor
  30. 30.True or false: a diode blows if current is high. (a) True (b) False
  31. 31.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) senses how bright it is (d) limits the current
  32. 32.What does a resistor do? (a) has coloured bands (b) lets current go one way (c) beeps for an alarm (d) stores a little charge
  33. 33.🧩 Which component makes things spin? (a) fuse (b) motor (c) LDR (d) buzzer
  34. 34.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  35. 35.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  36. 36.What does a diode do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) makes a beeping sound (d) lets current go one way
  37. 37.True or false: a motor turns a fan or wheels. (a) False (b) True
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.True or false: a thermistor has coloured bands. (a) True (b) False
  40. 40.True or false: an LDR blows if current is high. (a) True (b) False

Answer key

  1. a motor
  2. False
  3. blows if current is high
  4. senses how bright it is
  5. False
  6. store charge briefly
  7. buzzer
  8. boosts a small signal
  9. stores a little charge
  10. glows using little power
  11. buzzer
  12. a buzzer
  13. False
  14. True
  15. smooths a wobbly supply
  16. fuse
  17. makes a beeping sound
  18. senses how hot it is
  19. False
  20. False
  21. transistor
  22. makes things spin
  23. False
  24. resistor
  25. diode
  26. True
  27. False
  28. limits the current
  29. resistor
  30. False
  31. is a resistance knob
  32. has coloured bands
  33. motor
  34. True
  35. False
  36. lets current go one way
  37. True
  38. True
  39. False
  40. False

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