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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 171 · 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.

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

Answer key

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

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