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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 235 · 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 fuse do? (a) has coloured bands (b) blows if current is high (c) makes a beeping sound (d) lets current go one way
  3. 3.True or false: a capacitor boosts a small signal. (a) False (b) True
  4. 4.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) diode (d) motor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  6. 6.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  7. 7.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) senses how hot it is (d) is a resistance knob
  8. 8.What does an LDR do? (a) limits the current (b) makes things spin (c) senses how bright it is (d) turns a fan or wheels
  9. 9.What does a transistor do? (a) smooths a wobbly supply (b) blows if current is high (c) lets current go one way (d) boosts a small signal
  10. 10.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) boosts a small signal (d) makes things spin
  11. 11.What does an LED do? (a) boosts a small signal (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  12. 12.🧩 Which component beeps for an alarm? (a) potentiometer (b) LDR (c) diode (d) buzzer
  13. 13.What does a potentiometer do? (a) has coloured bands (b) is a resistance knob (c) makes a beeping sound (d) turns a fan or wheels
  14. 14.🧩 Which component makes a beeping sound? (a) buzzer (b) LDR (c) motor (d) capacitor
  15. 15.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  16. 16.What does a resistor do? (a) has coloured bands (b) makes a beeping sound (c) blows if current is high (d) turns a fan or wheels
  17. 17.What does a capacitor do? (a) stores a little charge (b) senses how hot it is (c) is a resistance knob (d) boosts a small signal
  18. 18.🧩 Which component glows using little power? (a) resistor (b) transistor (c) buzzer (d) LED
  19. 19.True or false: a resistor blows if current is high. (a) True (b) False
  20. 20.🧩 Which component blows if current is high? (a) buzzer (b) potentiometer (c) diode (d) fuse
  21. 21.True or false: a buzzer senses how bright it is. (a) True (b) False
  22. 22.🧩 Which component smooths a wobbly supply? (a) motor (b) resistor (c) potentiometer (d) capacitor
  23. 23.True or false: a transistor boosts a small signal. (a) True (b) False
  24. 24.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) capacitor (d) resistor
  25. 25.True or false: a capacitor stores a little charge. (a) False (b) True
  26. 26.True or false: a capacitor senses how bright it is. (a) False (b) True
  27. 27.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  28. 28.What does a diode do? (a) makes things spin (b) boosts a small signal (c) lets current go one way (d) blows if current is high
  29. 29.True or false: a resistor beeps for an alarm. (a) False (b) True
  30. 30.True or false: an LDR boosts a small signal. (a) True (b) False
  31. 31.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) resistor (d) diode
  32. 32.True or false: a thermistor limits the current. (a) False (b) True
  33. 33.True or false: a thermistor senses how hot it is. (a) False (b) True
  34. 34.🧩 Which component has coloured bands? (a) resistor (b) LDR (c) potentiometer (d) transistor
  35. 35.🧩 Which component stores a little charge? (a) LDR (b) thermistor (c) capacitor (d) buzzer
  36. 36.🧩 Which component turns a fan or wheels? (a) capacitor (b) buzzer (c) thermistor (d) motor
  37. 37.What does a motor do? (a) lets current go one way (b) senses how bright it is (c) makes things spin (d) makes a beeping sound
  38. 38.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  39. 39.True or false: an LED boosts a small signal. (a) False (b) True
  40. 40.True or false: an LDR blows if current is high. (a) False (b) True

Answer key

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

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