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Electronics Worksheet: Electronic Components

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

Answer key

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

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