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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 651 · 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 turns a fan or wheels. (a) True (b) False
  2. 2.True or false: a motor beeps for an alarm. (a) True (b) False
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  4. 4.What does a capacitor do? (a) makes a beeping sound (b) senses how bright it is (c) is a resistance knob (d) smooths a wobbly supply
  5. 5.What does a fuse do? (a) senses how bright it is (b) boosts a small signal (c) blows if current is high (d) stores a little charge
  6. 6.True or false: a fuse senses how hot it is. (a) False (b) True
  7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  8. 8.True or false: a capacitor blows if current is high. (a) False (b) True
  9. 9.🧩 Which component beeps for an alarm? (a) thermistor (b) buzzer (c) capacitor (d) diode
  10. 10.True or false: a buzzer limits the current. (a) False (b) True
  11. 11.🧩 Which component makes things spin? (a) motor (b) transistor (c) LED (d) capacitor
  12. 12.What does a potentiometer do? (a) is a resistance knob (b) stores a little charge (c) makes a beeping sound (d) smooths a wobbly supply
  13. 13.True or false: a capacitor lets current go one way. (a) True (b) False
  14. 14.What does an LED do? (a) makes a beeping sound (b) glows using little power (c) is a resistance knob (d) limits the current
  15. 15.True or false: a thermistor senses how hot it is. (a) False (b) True
  16. 16.What does a transistor do? (a) makes things spin (b) stores a little charge (c) boosts a small signal (d) smooths a wobbly supply
  17. 17.True or false: a motor senses how bright it is. (a) True (b) False
  18. 18.What does a thermistor do? (a) is a resistance knob (b) makes things spin (c) senses how hot it is (d) boosts a small signal
  19. 19.True or false: a motor makes things spin. (a) False (b) True
  20. 20.What does a buzzer do? (a) stores a little charge (b) turns a fan or wheels (c) makes a beeping sound (d) boosts a small signal
  21. 21.🧩 Which component blows if current is high? (a) LED (b) fuse (c) buzzer (d) capacitor
  22. 22.🧩 Which component boosts a small signal? (a) transistor (b) buzzer (c) thermistor (d) capacitor
  23. 23.🧩 Which component turns a fan or wheels? (a) thermistor (b) potentiometer (c) capacitor (d) motor
  24. 24.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) diode (d) motor
  25. 25.True or false: a transistor boosts a small signal. (a) True (b) False
  26. 26.True or false: a fuse blows if current is high. (a) False (b) True
  27. 27.🧩 Which component glows using little power? (a) buzzer (b) resistor (c) capacitor (d) LED
  28. 28.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  29. 29.True or false: a thermistor makes things spin. (a) True (b) False
  30. 30.True or false: a resistor limits the current. (a) False (b) True
  31. 31.🧩 Which component makes a beeping sound? (a) resistor (b) capacitor (c) buzzer (d) diode
  32. 32.True or false: a transistor beeps for an alarm. (a) False (b) True
  33. 33.True or false: a thermistor lets current go one way. (a) True (b) False
  34. 34.What does a motor do? (a) lets current go one way (b) limits the current (c) boosts a small signal (d) turns a fan or wheels
  35. 35.What does a resistor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) has coloured bands (d) stores a little charge
  36. 36.🧩 Which component lets current go one way? (a) diode (b) motor (c) potentiometer (d) capacitor
  37. 37.True or false: a diode is a resistance knob. (a) True (b) False
  38. 38.🧩 Which component limits the current? (a) transistor (b) resistor (c) thermistor (d) motor
  39. 39.True or false: a resistor senses how hot it is. (a) False (b) True
  40. 40.True or false: a fuse limits the current. (a) True (b) False

Answer key

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

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