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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 216 · 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 glows using little power? (a) potentiometer (b) motor (c) LED (d) buzzer
  2. 2.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  3. 3.🧩 Which component smooths a wobbly supply? (a) transistor (b) fuse (c) capacitor (d) diode
  4. 4.What does a resistor do? (a) beeps for an alarm (b) blows if current is high (c) is a resistance knob (d) has coloured bands
  5. 5.What does a thermistor do? (a) senses how hot it is (b) beeps for an alarm (c) makes a beeping sound (d) has coloured bands
  6. 6.True or false: a capacitor limits the current. (a) False (b) True
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  8. 8.True or false: a capacitor blows if current is high. (a) False (b) True
  9. 9.What does a motor do? (a) has coloured bands (b) lets current go one way (c) turns a fan or wheels (d) glows using little power
  10. 10.🧩 Which component boosts a small signal? (a) capacitor (b) LED (c) resistor (d) transistor
  11. 11.True or false: a buzzer beeps for an alarm. (a) False (b) True
  12. 12.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) makes things spin (d) senses how hot it is
  13. 13.True or false: a fuse blows if current is high. (a) False (b) True
  14. 14.True or false: a motor senses how hot it is. (a) False (b) True
  15. 15.What does a transistor do? (a) blows if current is high (b) beeps for an alarm (c) is a resistance knob (d) boosts a small signal
  16. 16.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  17. 17.True or false: a motor turns a fan or wheels. (a) False (b) True
  18. 18.True or false: a motor blows if current is high. (a) False (b) True
  19. 19.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) thermistor (d) LED
  20. 20.True or false: a transistor stores a little charge. (a) True (b) False
  21. 21.True or false: a potentiometer is a resistance knob. (a) False (b) True
  22. 22.🧩 Which component senses how bright it is? (a) fuse (b) potentiometer (c) LDR (d) motor
  23. 23.What does a fuse do? (a) boosts a small signal (b) senses how bright it is (c) blows if current is high (d) smooths a wobbly supply
  24. 24.True or false: an LDR boosts a small signal. (a) False (b) True
  25. 25.What does a motor do? (a) senses how hot it is (b) stores a little charge (c) makes things spin (d) blows if current is high
  26. 26.True or false: a resistor limits the current. (a) False (b) True
  27. 27.True or false: an LDR senses how bright it is. (a) True (b) False
  28. 28.True or false: a capacitor stores a little charge. (a) True (b) False
  29. 29.🧩 Which component limits the current? (a) buzzer (b) resistor (c) fuse (d) diode
  30. 30.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) diode (d) buzzer
  31. 31.🧩 Which component makes things spin? (a) motor (b) resistor (c) fuse (d) LDR
  32. 32.🧩 Which component senses how hot it is? (a) capacitor (b) fuse (c) motor (d) thermistor
  33. 33.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  34. 34.True or false: a buzzer limits the current. (a) True (b) False
  35. 35.What does a diode do? (a) is a resistance knob (b) lets current go one way (c) limits the current (d) stores a little charge
  36. 36.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  37. 37.🧩 Which component makes a beeping sound? (a) resistor (b) LDR (c) diode (d) buzzer
  38. 38.True or false: a diode turns a fan or wheels. (a) False (b) True
  39. 39.True or false: a buzzer lets current go one way. (a) True (b) False
  40. 40.True or false: a transistor makes a beeping sound. (a) False (b) True

Answer key

  1. LED
  2. store charge briefly
  3. capacitor
  4. has coloured bands
  5. senses how hot it is
  6. False
  7. a buzzer
  8. False
  9. turns a fan or wheels
  10. transistor
  11. True
  12. is a resistance knob
  13. True
  14. False
  15. boosts a small signal
  16. a motor
  17. True
  18. False
  19. resistor
  20. False
  21. True
  22. LDR
  23. blows if current is high
  24. False
  25. makes things spin
  26. True
  27. True
  28. True
  29. resistor
  30. motor
  31. motor
  32. thermistor
  33. False
  34. False
  35. lets current go one way
  36. True
  37. buzzer
  38. False
  39. False
  40. False

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