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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 474 · 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 component blows if current is high? (a) transistor (b) LED (c) fuse (d) potentiometer
  2. 2.What does an LDR do? (a) glows using little power (b) lets current go one way (c) has coloured bands (d) senses how bright it is
  3. 3.True or false: a thermistor boosts a small signal. (a) True (b) False
  4. 4.🧩 Which component stores a little charge? (a) buzzer (b) transistor (c) LDR (d) capacitor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  6. 6.What does a diode do? (a) is a resistance knob (b) turns a fan or wheels (c) glows using little power (d) lets current go one way
  7. 7.True or false: a capacitor stores a little charge. (a) False (b) True
  8. 8.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) potentiometer (d) transistor
  9. 9.What does a potentiometer do? (a) is a resistance knob (b) senses how hot it is (c) stores a little charge (d) smooths a wobbly supply
  10. 10.🧩 Which component boosts a small signal? (a) LED (b) potentiometer (c) transistor (d) buzzer
  11. 11.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  13. 13.True or false: a diode lets current go one way. (a) False (b) True
  14. 14.🧩 Which component is a resistance knob? (a) fuse (b) buzzer (c) potentiometer (d) motor
  15. 15.What does a resistor do? (a) limits the current (b) makes a beeping sound (c) smooths a wobbly supply (d) senses how hot it is
  16. 16.🧩 Which component senses how bright it is? (a) capacitor (b) transistor (c) thermistor (d) LDR
  17. 17.True or false: a potentiometer is a resistance knob. (a) False (b) True
  18. 18.🧩 Which component senses how hot it is? (a) thermistor (b) LDR (c) motor (d) buzzer
  19. 19.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) stores a little charge (d) turns a fan or wheels
  20. 20.True or false: a buzzer beeps for an alarm. (a) False (b) True
  21. 21.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) motor (d) diode
  22. 22.True or false: a diode turns a fan or wheels. (a) True (b) False
  23. 23.True or false: a transistor boosts a small signal. (a) True (b) False
  24. 24.🧩 Which component makes things spin? (a) capacitor (b) motor (c) buzzer (d) fuse
  25. 25.True or false: an LED makes a beeping sound. (a) True (b) False
  26. 26.True or false: a transistor stores a little charge. (a) True (b) False
  27. 27.True or false: a transistor has coloured bands. (a) False (b) True
  28. 28.What does a capacitor do? (a) has coloured bands (b) smooths a wobbly supply (c) is a resistance knob (d) makes a beeping sound
  29. 29.🧩 Which component smooths a wobbly supply? (a) transistor (b) buzzer (c) capacitor (d) LDR
  30. 30.True or false: a potentiometer has coloured bands. (a) True (b) False
  31. 31.What does a transistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) turns a fan or wheels (d) makes things spin
  32. 32.True or false: a motor makes things spin. (a) True (b) False
  33. 33.What does a buzzer do? (a) beeps for an alarm (b) is a resistance knob (c) has coloured bands (d) turns a fan or wheels
  34. 34.What does a fuse do? (a) turns a fan or wheels (b) blows if current is high (c) lets current go one way (d) glows using little power
  35. 35.True or false: an LDR lets current go one way. (a) False (b) True
  36. 36.True or false: an LDR makes things spin. (a) False (b) True
  37. 37.True or false: a thermistor senses how hot it is. (a) False (b) True
  38. 38.🧩 Which component glows using little power? (a) fuse (b) transistor (c) LED (d) resistor
  39. 39.What does a capacitor do? (a) boosts a small signal (b) limits the current (c) stores a little charge (d) senses how bright it is
  40. 40.True or false: a motor stores a little charge. (a) True (b) False

Answer key

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

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