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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 607 · 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.True or false: a motor lets current go one way. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  3. 3.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) blows if current is high (d) senses how bright it is
  4. 4.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  5. 5.What does a capacitor do? (a) makes things spin (b) has coloured bands (c) glows using little power (d) stores a little charge
  6. 6.True or false: an LDR senses how bright it is. (a) True (b) False
  7. 7.🧩 Which component stores a little charge? (a) fuse (b) transistor (c) capacitor (d) motor
  8. 8.🧩 Which component smooths a wobbly supply? (a) buzzer (b) potentiometer (c) fuse (d) capacitor
  9. 9.What does a buzzer do? (a) turns a fan or wheels (b) makes a beeping sound (c) stores a little charge (d) is a resistance knob
  10. 10.True or false: a motor makes things spin. (a) False (b) True
  11. 11.What does an LDR do? (a) senses how bright it is (b) beeps for an alarm (c) is a resistance knob (d) smooths a wobbly supply
  12. 12.What does a buzzer do? (a) lets current go one way (b) stores a little charge (c) makes things spin (d) beeps for an alarm
  13. 13.🧩 Which component is a resistance knob? (a) buzzer (b) resistor (c) diode (d) potentiometer
  14. 14.🧩 Which component beeps for an alarm? (a) capacitor (b) LED (c) buzzer (d) diode
  15. 15.True or false: a potentiometer stores a little charge. (a) True (b) False
  16. 16.True or false: a thermistor limits the current. (a) True (b) False
  17. 17.What does a diode do? (a) lets current go one way (b) senses how hot it is (c) limits the current (d) glows using little power
  18. 18.What does an LED do? (a) smooths a wobbly supply (b) senses how hot it is (c) glows using little power (d) stores a little charge
  19. 19.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) thermistor (d) fuse
  20. 20.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) motor (d) resistor
  21. 21.🧩 Which component makes a beeping sound? (a) thermistor (b) fuse (c) transistor (d) buzzer
  22. 22.True or false: a diode lets current go one way. (a) True (b) False
  23. 23.True or false: a potentiometer is a resistance knob. (a) True (b) False
  24. 24.True or false: a capacitor stores a little charge. (a) True (b) False
  25. 25.True or false: an LED is a resistance knob. (a) True (b) False
  26. 26.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  27. 27.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  28. 28.🧩 Which component limits the current? (a) diode (b) LDR (c) capacitor (d) resistor
  29. 29.What does a transistor do? (a) makes things spin (b) is a resistance knob (c) stores a little charge (d) boosts a small signal
  30. 30.True or false: an LED senses how bright it is. (a) True (b) False
  31. 31.🧩 Which component makes things spin? (a) LED (b) thermistor (c) motor (d) buzzer
  32. 32.What does a fuse do? (a) boosts a small signal (b) lets current go one way (c) blows if current is high (d) turns a fan or wheels
  33. 33.🧩 Which component has coloured bands? (a) LED (b) motor (c) resistor (d) diode
  34. 34.True or false: an LED lets current go one way. (a) False (b) True
  35. 35.True or false: an LDR lets current go one way. (a) False (b) True
  36. 36.True or false: a motor makes a beeping sound. (a) True (b) False
  37. 37.🧩 Which component senses how hot it is? (a) fuse (b) potentiometer (c) thermistor (d) diode
  38. 38.What does a motor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) stores a little charge (d) turns a fan or wheels
  39. 39.True or false: a thermistor stores a little charge. (a) False (b) True
  40. 40.What does a capacitor do? (a) lets current go one way (b) makes a beeping sound (c) smooths a wobbly supply (d) limits the current

Answer key

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

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