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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 667 · 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) an LED (d) a resistor
  2. 2.🧩 Which component stores a little charge? (a) resistor (b) buzzer (c) capacitor (d) fuse
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  4. 4.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  5. 5.🧩 Which component limits the current? (a) resistor (b) LED (c) transistor (d) buzzer
  6. 6.What does a fuse do? (a) limits the current (b) blows if current is high (c) smooths a wobbly supply (d) makes a beeping sound
  7. 7.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) LED (d) motor
  8. 8.🧩 Which component turns a fan or wheels? (a) motor (b) LED (c) potentiometer (d) thermistor
  9. 9.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) transistor (d) LED
  10. 10.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) resistor (d) LDR
  11. 11.True or false: an LDR senses how bright it is. (a) True (b) False
  12. 12.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) makes things spin (d) makes a beeping sound
  13. 13.What does a diode do? (a) lets current go one way (b) stores a little charge (c) limits the current (d) makes a beeping sound
  14. 14.What does an LDR do? (a) makes things spin (b) turns a fan or wheels (c) lets current go one way (d) senses how bright it is
  15. 15.True or false: a diode lets current go one way. (a) True (b) False
  16. 16.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) resistor (d) thermistor
  17. 17.True or false: a motor stores a little charge. (a) False (b) True
  18. 18.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  19. 19.🧩 Which component senses how hot it is? (a) motor (b) diode (c) capacitor (d) thermistor
  20. 20.🧩 Which component makes things spin? (a) motor (b) LED (c) LDR (d) buzzer
  21. 21.True or false: a thermistor beeps for an alarm. (a) True (b) False
  22. 22.What does a transistor do? (a) senses how bright it is (b) senses how hot it is (c) beeps for an alarm (d) boosts a small signal
  23. 23.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) thermistor (d) capacitor
  24. 24.What does a potentiometer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) makes a beeping sound (d) is a resistance knob
  25. 25.What does an LED do? (a) is a resistance knob (b) glows using little power (c) makes things spin (d) turns a fan or wheels
  26. 26.True or false: a resistor limits the current. (a) True (b) False
  27. 27.True or false: a potentiometer makes things spin. (a) True (b) False
  28. 28.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) thermistor (d) buzzer
  29. 29.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) buzzer (d) LDR
  30. 30.True or false: an LED glows using little power. (a) True (b) False
  31. 31.What does a motor do? (a) makes a beeping sound (b) beeps for an alarm (c) boosts a small signal (d) makes things spin
  32. 32.True or false: an LDR blows if current is high. (a) True (b) False
  33. 33.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
  34. 34.What does a capacitor do? (a) smooths a wobbly supply (b) is a resistance knob (c) blows if current is high (d) senses how hot it is
  35. 35.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) thermistor (d) LED
  36. 36.🧩 Which component lets current go one way? (a) capacitor (b) resistor (c) buzzer (d) diode
  37. 37.True or false: a transistor blows if current is high. (a) True (b) False
  38. 38.True or false: a buzzer makes a beeping sound. (a) False (b) True
  39. 39.True or false: a motor has coloured bands. (a) False (b) True
  40. 40.True or false: a thermistor has coloured bands. (a) False (b) True

Answer key

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

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