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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 64 · 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 senses how bright it is? (a) motor (b) capacitor (c) thermistor (d) LDR
  2. 2.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  3. 3.What does an LED do? (a) smooths a wobbly supply (b) glows using little power (c) makes things spin (d) beeps for an alarm
  4. 4.True or false: a potentiometer is a resistance knob. (a) False (b) True
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  6. 6.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  7. 7.🧩 Which component limits the current? (a) LDR (b) fuse (c) resistor (d) diode
  8. 8.What does a resistor do? (a) lets current go one way (b) limits the current (c) boosts a small signal (d) turns a fan or wheels
  9. 9.True or false: a fuse has coloured bands. (a) False (b) True
  10. 10.🧩 Which component boosts a small signal? (a) potentiometer (b) motor (c) transistor (d) fuse
  11. 11.What does a potentiometer do? (a) is a resistance knob (b) glows using little power (c) makes things spin (d) blows if current is high
  12. 12.What does a buzzer do? (a) is a resistance knob (b) boosts a small signal (c) senses how hot it is (d) beeps for an alarm
  13. 13.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) diode (d) resistor
  14. 14.What does a diode do? (a) smooths a wobbly supply (b) stores a little charge (c) senses how bright it is (d) lets current go one way
  15. 15.🧩 Which component senses how hot it is? (a) motor (b) transistor (c) resistor (d) thermistor
  16. 16.True or false: a resistor limits the current. (a) True (b) False
  17. 17.What does a fuse do? (a) has coloured bands (b) makes a beeping sound (c) blows if current is high (d) beeps for an alarm
  18. 18.True or false: a motor turns a fan or wheels. (a) False (b) True
  19. 19.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  20. 20.True or false: a thermistor senses how hot it is. (a) True (b) False
  21. 21.True or false: an LDR is a resistance knob. (a) True (b) False
  22. 22.True or false: a resistor has coloured bands. (a) False (b) True
  23. 23.True or false: a motor beeps for an alarm. (a) True (b) False
  24. 24.What does a buzzer do? (a) has coloured bands (b) boosts a small signal (c) makes a beeping sound (d) makes things spin
  25. 25.What does a capacitor do? (a) limits the current (b) makes things spin (c) stores a little charge (d) blows if current is high
  26. 26.True or false: a buzzer makes things spin. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) resistor (b) transistor (c) capacitor (d) LED
  28. 28.What does a motor do? (a) senses how hot it is (b) glows using little power (c) turns a fan or wheels (d) is a resistance knob
  29. 29.🧩 Which component makes a beeping sound? (a) resistor (b) buzzer (c) potentiometer (d) LDR
  30. 30.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) buzzer (d) capacitor
  31. 31.True or false: an LDR has coloured bands. (a) True (b) False
  32. 32.True or false: a motor glows using little power. (a) True (b) False
  33. 33.True or false: a buzzer limits the current. (a) True (b) False
  34. 34.True or false: a buzzer beeps for an alarm. (a) False (b) True
  35. 35.True or false: a resistor turns a fan or wheels. (a) False (b) True
  36. 36.True or false: a capacitor stores a little charge. (a) True (b) False
  37. 37.True or false: a buzzer makes a beeping sound. (a) False (b) True
  38. 38.True or false: a diode lets current go one way. (a) True (b) False
  39. 39.🧩 Which component smooths a wobbly supply? (a) capacitor (b) resistor (c) LED (d) potentiometer
  40. 40.True or false: a thermistor makes things spin. (a) False (b) True

Answer key

  1. LDR
  2. a motor
  3. glows using little power
  4. True
  5. store charge briefly
  6. a buzzer
  7. resistor
  8. limits the current
  9. False
  10. transistor
  11. is a resistance knob
  12. beeps for an alarm
  13. potentiometer
  14. lets current go one way
  15. thermistor
  16. True
  17. blows if current is high
  18. True
  19. False
  20. True
  21. False
  22. True
  23. False
  24. makes a beeping sound
  25. stores a little charge
  26. False
  27. capacitor
  28. turns a fan or wheels
  29. buzzer
  30. resistor
  31. False
  32. False
  33. False
  34. True
  35. False
  36. True
  37. True
  38. True
  39. capacitor
  40. False

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