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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 99 · 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 sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  3. 3.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  4. 4.🧩 Which component makes things spin? (a) LED (b) motor (c) thermistor (d) diode
  5. 5.True or false: a diode boosts a small signal. (a) False (b) True
  6. 6.🧩 Which component has coloured bands? (a) motor (b) LDR (c) transistor (d) resistor
  7. 7.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) capacitor (d) diode
  8. 8.🧩 Which component makes a beeping sound? (a) buzzer (b) LDR (c) fuse (d) motor
  9. 9.What does a buzzer do? (a) glows using little power (b) stores a little charge (c) makes a beeping sound (d) senses how bright it is
  10. 10.What does a diode do? (a) glows using little power (b) lets current go one way (c) stores a little charge (d) senses how hot it is
  11. 11.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  12. 12.True or false: a motor turns a fan or wheels. (a) True (b) False
  13. 13.🧩 Which component beeps for an alarm? (a) transistor (b) motor (c) potentiometer (d) buzzer
  14. 14.🧩 Which component senses how bright it is? (a) LED (b) transistor (c) LDR (d) fuse
  15. 15.What does a motor do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) senses how bright it is
  16. 16.🧩 Which component glows using little power? (a) LED (b) motor (c) thermistor (d) resistor
  17. 17.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) buzzer (d) potentiometer
  18. 18.What does a potentiometer do? (a) is a resistance knob (b) glows using little power (c) beeps for an alarm (d) smooths a wobbly supply
  19. 19.What does a transistor do? (a) beeps for an alarm (b) stores a little charge (c) is a resistance knob (d) boosts a small signal
  20. 20.True or false: a resistor has coloured bands. (a) False (b) True
  21. 21.True or false: a potentiometer is a resistance knob. (a) False (b) True
  22. 22.What does a motor do? (a) makes things spin (b) beeps for an alarm (c) glows using little power (d) is a resistance knob
  23. 23.True or false: a motor glows using little power. (a) False (b) True
  24. 24.True or false: a capacitor stores a little charge. (a) True (b) False
  25. 25.What does a buzzer do? (a) beeps for an alarm (b) has coloured bands (c) glows using little power (d) limits the current
  26. 26.True or false: a thermistor glows using little power. (a) True (b) False
  27. 27.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) LED (d) capacitor
  28. 28.🧩 Which component stores a little charge? (a) resistor (b) capacitor (c) LDR (d) diode
  29. 29.True or false: a thermistor boosts a small signal. (a) False (b) True
  30. 30.True or false: a buzzer makes a beeping sound. (a) False (b) True
  31. 31.What does an LDR do? (a) limits the current (b) turns a fan or wheels (c) lets current go one way (d) senses how bright it is
  32. 32.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  33. 33.🧩 Which component smooths a wobbly supply? (a) buzzer (b) thermistor (c) diode (d) capacitor
  34. 34.🧩 Which component blows if current is high? (a) fuse (b) motor (c) capacitor (d) LED
  35. 35.True or false: a buzzer beeps for an alarm. (a) False (b) True
  36. 36.What does an LED do? (a) lets current go one way (b) glows using little power (c) senses how bright it is (d) boosts a small signal
  37. 37.True or false: a motor makes things spin. (a) True (b) False
  38. 38.True or false: a diode glows using little power. (a) True (b) False
  39. 39.True or false: an LED glows using little power. (a) True (b) False
  40. 40.True or false: a transistor boosts a small signal. (a) False (b) True

Answer key

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

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