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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 536 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  3. 3.True or false: a diode is a resistance knob. (a) False (b) True
  4. 4.True or false: a buzzer beeps for an alarm. (a) False (b) True
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  6. 6.🧩 Which component glows using little power? (a) LDR (b) transistor (c) LED (d) thermistor
  7. 7.True or false: a motor stores a little charge. (a) True (b) False
  8. 8.What does a motor do? (a) glows using little power (b) makes a beeping sound (c) makes things spin (d) lets current go one way
  9. 9.True or false: a fuse blows if current is high. (a) False (b) True
  10. 10.True or false: a potentiometer senses how hot it is. (a) True (b) False
  11. 11.What does a capacitor do? (a) turns a fan or wheels (b) stores a little charge (c) senses how bright it is (d) has coloured bands
  12. 12.True or false: a resistor limits the current. (a) True (b) False
  13. 13.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) motor (d) buzzer
  14. 14.True or false: an LED makes things spin. (a) False (b) True
  15. 15.True or false: a motor makes things spin. (a) False (b) True
  16. 16.🧩 Which component makes a beeping sound? (a) LED (b) transistor (c) resistor (d) buzzer
  17. 17.True or false: an LED glows using little power. (a) True (b) False
  18. 18.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) resistor (d) LDR
  19. 19.True or false: a motor turns a fan or wheels. (a) True (b) False
  20. 20.🧩 Which component senses how hot it is? (a) diode (b) buzzer (c) thermistor (d) transistor
  21. 21.What does a resistor do? (a) has coloured bands (b) is a resistance knob (c) glows using little power (d) smooths a wobbly supply
  22. 22.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) diode (d) resistor
  23. 23.True or false: a buzzer is a resistance knob. (a) True (b) False
  24. 24.True or false: a buzzer lets current go one way. (a) False (b) True
  25. 25.True or false: a transistor boosts a small signal. (a) False (b) True
  26. 26.🧩 Which component is a resistance knob? (a) resistor (b) fuse (c) potentiometer (d) buzzer
  27. 27.True or false: a diode lets current go one way. (a) True (b) False
  28. 28.True or false: a thermistor is a resistance knob. (a) True (b) False
  29. 29.What does a resistor do? (a) blows if current is high (b) limits the current (c) boosts a small signal (d) smooths a wobbly supply
  30. 30.🧩 Which component lets current go one way? (a) LED (b) thermistor (c) capacitor (d) diode
  31. 31.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  32. 32.True or false: a buzzer blows if current is high. (a) True (b) False
  33. 33.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) fuse (d) buzzer
  34. 34.True or false: a potentiometer lets current go one way. (a) True (b) False
  35. 35.🧩 Which component limits the current? (a) LED (b) resistor (c) buzzer (d) thermistor
  36. 36.True or false: a resistor turns a fan or wheels. (a) False (b) True
  37. 37.What does a transistor do? (a) boosts a small signal (b) turns a fan or wheels (c) senses how hot it is (d) beeps for an alarm
  38. 38.What does a potentiometer do? (a) smooths a wobbly supply (b) senses how bright it is (c) boosts a small signal (d) is a resistance knob
  39. 39.🧩 Which component smooths a wobbly supply? (a) LDR (b) LED (c) capacitor (d) diode
  40. 40.True or false: a transistor has coloured bands. (a) False (b) True

Answer key

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

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