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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 66 · 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 movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  2. 2.True or false: a transistor boosts a small signal. (a) True (b) False
  3. 3.🧩 Which component makes things spin? (a) motor (b) LED (c) capacitor (d) transistor
  4. 4.🧩 Which component makes a beeping sound? (a) capacitor (b) LDR (c) buzzer (d) thermistor
  5. 5.True or false: a potentiometer boosts a small signal. (a) True (b) False
  6. 6.🧩 Which component blows if current is high? (a) buzzer (b) diode (c) capacitor (d) fuse
  7. 7.What does a transistor do? (a) smooths a wobbly supply (b) is a resistance knob (c) makes things spin (d) boosts a small signal
  8. 8.🧩 Which component turns a fan or wheels? (a) capacitor (b) resistor (c) fuse (d) motor
  9. 9.True or false: a fuse boosts a small signal. (a) False (b) True
  10. 10.🧩 Which component lets current go one way? (a) resistor (b) buzzer (c) thermistor (d) diode
  11. 11.True or false: an LED senses how bright it is. (a) False (b) True
  12. 12.🧩 Which component glows using little power? (a) buzzer (b) diode (c) LED (d) thermistor
  13. 13.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) potentiometer (d) transistor
  14. 14.True or false: a buzzer makes a beeping sound. (a) True (b) False
  15. 15.True or false: a buzzer limits the current. (a) True (b) False
  16. 16.🧩 Which component senses how hot it is? (a) potentiometer (b) capacitor (c) fuse (d) thermistor
  17. 17.🧩 Which component is a resistance knob? (a) buzzer (b) resistor (c) potentiometer (d) transistor
  18. 18.True or false: a resistor has coloured bands. (a) True (b) False
  19. 19.🧩 Which component beeps for an alarm? (a) potentiometer (b) motor (c) buzzer (d) LED
  20. 20.What does a potentiometer do? (a) limits the current (b) beeps for an alarm (c) senses how hot it is (d) is a resistance knob
  21. 21.What does a capacitor do? (a) beeps for an alarm (b) boosts a small signal (c) smooths a wobbly supply (d) has coloured bands
  22. 22.True or false: a resistor beeps for an alarm. (a) False (b) True
  23. 23.What does a motor do? (a) makes a beeping sound (b) turns a fan or wheels (c) limits the current (d) boosts a small signal
  24. 24.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) boosts a small signal (d) has coloured bands
  25. 25.What does a buzzer do? (a) glows using little power (b) boosts a small signal (c) senses how hot it is (d) makes a beeping sound
  26. 26.What does a diode do? (a) stores a little charge (b) makes a beeping sound (c) lets current go one way (d) is a resistance knob
  27. 27.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  28. 28.🧩 Which component limits the current? (a) LDR (b) resistor (c) potentiometer (d) buzzer
  29. 29.What does a fuse do? (a) blows if current is high (b) turns a fan or wheels (c) beeps for an alarm (d) senses how bright it is
  30. 30.True or false: an LDR turns a fan or wheels. (a) True (b) False
  31. 31.True or false: a transistor turns a fan or wheels. (a) True (b) False
  32. 32.True or false: a thermistor senses how hot it is. (a) True (b) False
  33. 33.What does a thermistor do? (a) boosts a small signal (b) makes a beeping sound (c) is a resistance knob (d) senses how hot it is
  34. 34.True or false: a motor turns a fan or wheels. (a) True (b) False
  35. 35.True or false: a potentiometer blows if current is high. (a) True (b) False
  36. 36.True or false: a potentiometer senses how hot it is. (a) False (b) True
  37. 37.What does a capacitor do? (a) senses how bright it is (b) makes a beeping sound (c) stores a little charge (d) limits the current
  38. 38.True or false: a resistor limits the current. (a) True (b) False
  39. 39.True or false: a motor blows if current is high. (a) False (b) True
  40. 40.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) thermistor (d) potentiometer

Answer key

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

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