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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 712 · 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 has coloured bands? (a) diode (b) LED (c) resistor (d) fuse
  2. 2.True or false: a resistor has coloured bands. (a) True (b) False
  3. 3.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) motor (d) LDR
  4. 4.True or false: a resistor limits the current. (a) False (b) True
  5. 5.What does a diode do? (a) glows using little power (b) lets current go one way (c) turns a fan or wheels (d) is a resistance knob
  6. 6.What does a capacitor do? (a) has coloured bands (b) is a resistance knob (c) stores a little charge (d) beeps for an alarm
  7. 7.What does a resistor do? (a) has coloured bands (b) turns a fan or wheels (c) is a resistance knob (d) blows if current is high
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  9. 9.🧩 Which component makes things spin? (a) resistor (b) transistor (c) thermistor (d) motor
  10. 10.True or false: a resistor turns a fan or wheels. (a) False (b) True
  11. 11.🧩 Which component turns a fan or wheels? (a) fuse (b) motor (c) transistor (d) LDR
  12. 12.🧩 Which component smooths a wobbly supply? (a) diode (b) LED (c) resistor (d) capacitor
  13. 13.True or false: a thermistor turns a fan or wheels. (a) False (b) True
  14. 14.True or false: a fuse beeps for an alarm. (a) False (b) True
  15. 15.True or false: a thermistor stores a little charge. (a) False (b) True
  16. 16.🧩 Which component senses how hot it is? (a) transistor (b) potentiometer (c) fuse (d) thermistor
  17. 17.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  18. 18.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  19. 19.What does a capacitor do? (a) smooths a wobbly supply (b) makes things spin (c) glows using little power (d) boosts a small signal
  20. 20.True or false: a motor glows using little power. (a) False (b) True
  21. 21.🧩 Which component limits the current? (a) potentiometer (b) buzzer (c) capacitor (d) resistor
  22. 22.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) motor (d) potentiometer
  23. 23.🧩 Which component beeps for an alarm? (a) fuse (b) motor (c) resistor (d) buzzer
  24. 24.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) thermistor (d) capacitor
  25. 25.What does a buzzer do? (a) makes things spin (b) smooths a wobbly supply (c) beeps for an alarm (d) blows if current is high
  26. 26.True or false: a motor turns a fan or wheels. (a) True (b) False
  27. 27.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) buzzer (d) resistor
  28. 28.What does a potentiometer do? (a) glows using little power (b) lets current go one way (c) is a resistance knob (d) makes things spin
  29. 29.True or false: a thermistor senses how hot it is. (a) True (b) False
  30. 30.True or false: an LED turns a fan or wheels. (a) False (b) True
  31. 31.True or false: an LED senses how hot it is. (a) False (b) True
  32. 32.What does an LDR do? (a) makes a beeping sound (b) senses how bright it is (c) has coloured bands (d) lets current go one way
  33. 33.True or false: a buzzer beeps for an alarm. (a) False (b) True
  34. 34.🧩 Which component boosts a small signal? (a) LDR (b) potentiometer (c) transistor (d) LED
  35. 35.What does a thermistor do? (a) senses how hot it is (b) makes a beeping sound (c) blows if current is high (d) limits the current
  36. 36.True or false: a diode has coloured bands. (a) True (b) False
  37. 37.True or false: an LED smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  39. 39.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) beeps for an alarm (d) blows if current is high
  40. 40.True or false: a capacitor senses how bright it is. (a) False (b) True

Answer key

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

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