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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 565 · 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) an LED (c) a fuse (d) a resistor
  2. 2.🧩 Which component limits the current? (a) buzzer (b) resistor (c) fuse (d) transistor
  3. 3.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) beeps for an alarm (d) smooths a wobbly supply
  4. 4.🧩 Which component makes things spin? (a) fuse (b) buzzer (c) motor (d) thermistor
  5. 5.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) fuse (d) motor
  6. 6.🧩 Which component glows using little power? (a) LDR (b) buzzer (c) LED (d) thermistor
  7. 7.True or false: a transistor is a resistance knob. (a) True (b) False
  8. 8.What does a diode do? (a) stores a little charge (b) has coloured bands (c) turns a fan or wheels (d) lets current go one way
  9. 9.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) makes things spin (d) makes a beeping sound
  10. 10.🧩 Which component boosts a small signal? (a) resistor (b) buzzer (c) transistor (d) diode
  11. 11.What does a buzzer do? (a) makes things spin (b) stores a little charge (c) is a resistance knob (d) makes a beeping sound
  12. 12.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  13. 13.True or false: a resistor beeps for an alarm. (a) True (b) False
  14. 14.🧩 Which component blows if current is high? (a) resistor (b) buzzer (c) diode (d) fuse
  15. 15.True or false: a fuse blows if current is high. (a) True (b) False
  16. 16.What does a capacitor do? (a) lets current go one way (b) beeps for an alarm (c) has coloured bands (d) smooths a wobbly supply
  17. 17.What does a capacitor do? (a) limits the current (b) beeps for an alarm (c) stores a little charge (d) blows if current is high
  18. 18.🧩 Which component lets current go one way? (a) transistor (b) capacitor (c) LDR (d) diode
  19. 19.🧩 Which component smooths a wobbly supply? (a) fuse (b) buzzer (c) capacitor (d) diode
  20. 20.True or false: a diode smooths a wobbly supply. (a) True (b) False
  21. 21.What does an LED do? (a) is a resistance knob (b) stores a little charge (c) blows if current is high (d) glows using little power
  22. 22.🧩 Which component senses how bright it is? (a) resistor (b) capacitor (c) LDR (d) fuse
  23. 23.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) motor (d) transistor
  24. 24.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) LED (d) capacitor
  25. 25.True or false: a motor blows if current is high. (a) True (b) False
  26. 26.True or false: a diode makes a beeping sound. (a) False (b) True
  27. 27.True or false: a thermistor lets current go one way. (a) False (b) True
  28. 28.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  29. 29.True or false: an LED is a resistance knob. (a) False (b) True
  30. 30.What does a motor do? (a) turns a fan or wheels (b) senses how bright it is (c) smooths a wobbly supply (d) limits the current
  31. 31.What does a thermistor do? (a) lets current go one way (b) smooths a wobbly supply (c) senses how hot it is (d) beeps for an alarm
  32. 32.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) transistor (d) capacitor
  33. 33.True or false: an LDR senses how bright it is. (a) False (b) True
  34. 34.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  35. 35.What does a resistor do? (a) has coloured bands (b) turns a fan or wheels (c) smooths a wobbly supply (d) is a resistance knob
  36. 36.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) resistor (d) motor
  37. 37.What does a buzzer do? (a) beeps for an alarm (b) senses how bright it is (c) turns a fan or wheels (d) is a resistance knob
  38. 38.True or false: a thermistor stores a little charge. (a) False (b) True
  39. 39.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) is a resistance knob (d) senses how hot it is
  40. 40.True or false: a capacitor stores a little charge. (a) True (b) False

Answer key

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

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