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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 588 · 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.What does a fuse do? (a) has coloured bands (b) turns a fan or wheels (c) blows if current is high (d) senses how bright it is
  3. 3.🧩 Which component blows if current is high? (a) resistor (b) capacitor (c) fuse (d) motor
  4. 4.🧩 Which component lets current go one way? (a) LED (b) thermistor (c) LDR (d) diode
  5. 5.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) fuse (d) diode
  6. 6.🧩 Which component turns a fan or wheels? (a) LED (b) resistor (c) motor (d) capacitor
  7. 7.True or false: a transistor boosts a small signal. (a) True (b) False
  8. 8.True or false: a thermistor has coloured bands. (a) False (b) True
  9. 9.What does a capacitor do? (a) stores a little charge (b) senses how hot it is (c) blows if current is high (d) glows using little power
  10. 10.True or false: a buzzer beeps for an alarm. (a) True (b) False
  11. 11.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  12. 12.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  13. 13.True or false: a resistor has coloured bands. (a) True (b) False
  14. 14.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  15. 15.True or false: a buzzer makes a beeping sound. (a) False (b) True
  16. 16.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) LDR (d) transistor
  17. 17.What does a potentiometer do? (a) beeps for an alarm (b) is a resistance knob (c) stores a little charge (d) blows if current is high
  18. 18.What does a transistor do? (a) blows if current is high (b) makes a beeping sound (c) smooths a wobbly supply (d) boosts a small signal
  19. 19.🧩 Which component makes a beeping sound? (a) thermistor (b) motor (c) buzzer (d) LDR
  20. 20.True or false: a motor turns a fan or wheels. (a) False (b) True
  21. 21.What does a thermistor do? (a) makes a beeping sound (b) is a resistance knob (c) senses how hot it is (d) smooths a wobbly supply
  22. 22.🧩 Which component has coloured bands? (a) motor (b) transistor (c) resistor (d) potentiometer
  23. 23.True or false: a motor makes a beeping sound. (a) True (b) False
  24. 24.🧩 Which component glows using little power? (a) resistor (b) fuse (c) LED (d) capacitor
  25. 25.🧩 Which component senses how hot it is? (a) fuse (b) LDR (c) thermistor (d) motor
  26. 26.True or false: a buzzer stores a little charge. (a) False (b) True
  27. 27.What does an LED do? (a) smooths a wobbly supply (b) glows using little power (c) has coloured bands (d) makes a beeping sound
  28. 28.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) capacitor (d) thermistor
  29. 29.What does a diode do? (a) glows using little power (b) lets current go one way (c) limits the current (d) smooths a wobbly supply
  30. 30.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) transistor (d) thermistor
  31. 31.True or false: an LDR senses how bright it is. (a) True (b) False
  32. 32.What does a motor do? (a) has coloured bands (b) senses how bright it is (c) makes things spin (d) limits the current
  33. 33.🧩 Which component is a resistance knob? (a) LDR (b) diode (c) potentiometer (d) LED
  34. 34.What does a buzzer do? (a) makes things spin (b) has coloured bands (c) beeps for an alarm (d) blows if current is high
  35. 35.🧩 Which component makes things spin? (a) thermistor (b) fuse (c) motor (d) potentiometer
  36. 36.True or false: a fuse turns a fan or wheels. (a) False (b) True
  37. 37.What does a buzzer do? (a) senses how hot it is (b) stores a little charge (c) limits the current (d) makes a beeping sound
  38. 38.True or false: a diode limits the current. (a) True (b) False
  39. 39.True or false: a thermistor stores a little charge. (a) True (b) False
  40. 40.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) buzzer (d) LED

Answer key

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

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