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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 432 · 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.

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

Answer key

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

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