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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 566 · 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 thermistor senses how hot it is. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  3. 3.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) transistor (d) fuse
  4. 4.🧩 Which component has coloured bands? (a) motor (b) resistor (c) capacitor (d) LED
  5. 5.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  6. 6.True or false: a potentiometer is a resistance knob. (a) True (b) False
  7. 7.🧩 Which component makes things spin? (a) potentiometer (b) LDR (c) diode (d) motor
  8. 8.🧩 Which component smooths a wobbly supply? (a) transistor (b) buzzer (c) capacitor (d) thermistor
  9. 9.🧩 Which component senses how hot it is? (a) LDR (b) capacitor (c) thermistor (d) fuse
  10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  11. 11.🧩 Which component senses how bright it is? (a) potentiometer (b) resistor (c) motor (d) LDR
  12. 12.True or false: a resistor limits the current. (a) True (b) False
  13. 13.True or false: an LDR senses how bright it is. (a) False (b) True
  14. 14.What does a thermistor do? (a) turns a fan or wheels (b) has coloured bands (c) is a resistance knob (d) senses how hot it is
  15. 15.True or false: an LED senses how bright it is. (a) True (b) False
  16. 16.True or false: a buzzer makes a beeping sound. (a) False (b) True
  17. 17.True or false: a fuse boosts a small signal. (a) True (b) False
  18. 18.What does a buzzer do? (a) glows using little power (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  19. 19.🧩 Which component glows using little power? (a) LED (b) resistor (c) thermistor (d) buzzer
  20. 20.True or false: a buzzer is a resistance knob. (a) True (b) False
  21. 21.What does a motor do? (a) turns a fan or wheels (b) blows if current is high (c) has coloured bands (d) limits the current
  22. 22.🧩 Which component limits the current? (a) resistor (b) LDR (c) potentiometer (d) capacitor
  23. 23.What does a transistor do? (a) lets current go one way (b) senses how bright it is (c) boosts a small signal (d) limits the current
  24. 24.🧩 Which component blows if current is high? (a) LDR (b) thermistor (c) buzzer (d) fuse
  25. 25.What does a fuse do? (a) glows using little power (b) beeps for an alarm (c) makes a beeping sound (d) blows if current is high
  26. 26.True or false: a thermistor lets current go one way. (a) True (b) False
  27. 27.What does an LDR do? (a) has coloured bands (b) senses how bright it is (c) smooths a wobbly supply (d) glows using little power
  28. 28.True or false: a motor makes things spin. (a) False (b) True
  29. 29.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) boosts a small signal (d) stores a little charge
  30. 30.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) buzzer (d) diode
  31. 31.True or false: a buzzer boosts a small signal. (a) False (b) True
  32. 32.True or false: a resistor has coloured bands. (a) False (b) True
  33. 33.What does a capacitor do? (a) is a resistance knob (b) makes things spin (c) stores a little charge (d) limits the current
  34. 34.True or false: a diode senses how hot it is. (a) False (b) True
  35. 35.True or false: a capacitor stores a little charge. (a) True (b) False
  36. 36.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  37. 37.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) resistor (d) thermistor
  38. 38.True or false: a capacitor makes a beeping sound. (a) True (b) False
  39. 39.What does a diode do? (a) makes a beeping sound (b) stores a little charge (c) turns a fan or wheels (d) lets current go one way
  40. 40.True or false: a transistor boosts a small signal. (a) True (b) False

Answer key

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

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