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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 643 · 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 transistor glows using little power. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  3. 3.True or false: a fuse glows using little power. (a) True (b) False
  4. 4.What does a resistor do? (a) limits the current (b) lets current go one way (c) boosts a small signal (d) beeps for an alarm
  5. 5.What does a diode do? (a) lets current go one way (b) makes a beeping sound (c) turns a fan or wheels (d) boosts a small signal
  6. 6.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) fuse (d) LDR
  7. 7.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) senses how bright it is (d) turns a fan or wheels
  8. 8.What does an LDR do? (a) is a resistance knob (b) stores a little charge (c) senses how bright it is (d) beeps for an alarm
  9. 9.🧩 Which component makes a beeping sound? (a) diode (b) LED (c) potentiometer (d) buzzer
  10. 10.🧩 Which component lets current go one way? (a) diode (b) LED (c) resistor (d) motor
  11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  12. 12.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) thermistor (d) potentiometer
  13. 13.What does a thermistor do? (a) has coloured bands (b) stores a little charge (c) senses how hot it is (d) smooths a wobbly supply
  14. 14.What does a capacitor do? (a) blows if current is high (b) stores a little charge (c) has coloured bands (d) beeps for an alarm
  15. 15.🧩 Which component makes things spin? (a) diode (b) thermistor (c) LDR (d) motor
  16. 16.🧩 Which component beeps for an alarm? (a) transistor (b) diode (c) motor (d) buzzer
  17. 17.True or false: a motor has coloured bands. (a) False (b) True
  18. 18.True or false: a capacitor beeps for an alarm. (a) False (b) True
  19. 19.What does a resistor do? (a) has coloured bands (b) smooths a wobbly supply (c) lets current go one way (d) beeps for an alarm
  20. 20.🧩 Which component glows using little power? (a) capacitor (b) LED (c) motor (d) resistor
  21. 21.True or false: a diode lets current go one way. (a) True (b) False
  22. 22.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) makes things spin (d) makes a beeping sound
  23. 23.True or false: a transistor turns a fan or wheels. (a) True (b) False
  24. 24.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  25. 25.What does a motor do? (a) makes things spin (b) limits the current (c) makes a beeping sound (d) smooths a wobbly supply
  26. 26.🧩 Which component boosts a small signal? (a) buzzer (b) diode (c) transistor (d) capacitor
  27. 27.True or false: a motor turns a fan or wheels. (a) True (b) False
  28. 28.True or false: a transistor boosts a small signal. (a) True (b) False
  29. 29.True or false: a capacitor limits the current. (a) False (b) True
  30. 30.What does a capacitor do? (a) senses how bright it is (b) limits the current (c) has coloured bands (d) smooths a wobbly supply
  31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
  32. 32.🧩 Which component limits the current? (a) resistor (b) capacitor (c) buzzer (d) diode
  33. 33.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) lets current go one way (d) stores a little charge
  34. 34.True or false: a diode limits the current. (a) True (b) False
  35. 35.🧩 Which component turns a fan or wheels? (a) motor (b) LDR (c) thermistor (d) LED
  36. 36.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  37. 37.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) LED (d) potentiometer
  38. 38.True or false: a transistor makes things spin. (a) True (b) False
  39. 39.True or false: a buzzer beeps for an alarm. (a) False (b) True
  40. 40.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) limits the current (d) beeps for an alarm

Answer key

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

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