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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 546 · 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 beeps for an alarm? (a) buzzer (b) fuse (c) LED (d) transistor
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  3. 3.What does a fuse do? (a) blows if current is high (b) limits the current (c) lets current go one way (d) makes things spin
  4. 4.True or false: a transistor blows if current is high. (a) True (b) False
  5. 5.🧩 Which component smooths a wobbly supply? (a) LDR (b) LED (c) capacitor (d) resistor
  6. 6.True or false: a capacitor limits the current. (a) False (b) True
  7. 7.🧩 Which component senses how hot it is? (a) fuse (b) diode (c) potentiometer (d) thermistor
  8. 8.What does a capacitor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) blows if current is high (d) limits the current
  9. 9.True or false: a motor has coloured bands. (a) False (b) True
  10. 10.True or false: a resistor has coloured bands. (a) True (b) False
  11. 11.True or false: a potentiometer is a resistance knob. (a) False (b) True
  12. 12.What does a thermistor do? (a) lets current go one way (b) turns a fan or wheels (c) senses how hot it is (d) is a resistance knob
  13. 13.🧩 Which component limits the current? (a) potentiometer (b) resistor (c) transistor (d) capacitor
  14. 14.True or false: a diode limits the current. (a) False (b) True
  15. 15.🧩 Which component stores a little charge? (a) resistor (b) transistor (c) capacitor (d) LED
  16. 16.What does a resistor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) lets current go one way (d) has coloured bands
  17. 17.True or false: an LED makes a beeping sound. (a) True (b) False
  18. 18.What does a motor do? (a) senses how hot it is (b) beeps for an alarm (c) turns a fan or wheels (d) senses how bright it is
  19. 19.🧩 Which component blows if current is high? (a) motor (b) diode (c) capacitor (d) fuse
  20. 20.🧩 Which component is a resistance knob? (a) motor (b) potentiometer (c) LED (d) fuse
  21. 21.True or false: a motor boosts a small signal. (a) True (b) False
  22. 22.True or false: a motor makes things spin. (a) True (b) False
  23. 23.What does an LED do? (a) glows using little power (b) lets current go one way (c) boosts a small signal (d) turns a fan or wheels
  24. 24.🧩 Which component has coloured bands? (a) LED (b) potentiometer (c) buzzer (d) resistor
  25. 25.True or false: a resistor turns a fan or wheels. (a) True (b) False
  26. 26.True or false: a thermistor beeps for an alarm. (a) True (b) False
  27. 27.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  28. 28.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  29. 29.What does a motor do? (a) beeps for an alarm (b) stores a little charge (c) makes things spin (d) blows if current is high
  30. 30.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) capacitor (d) motor
  31. 31.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  32. 32.True or false: a motor smooths a wobbly supply. (a) False (b) True
  33. 33.What does a capacitor do? (a) turns a fan or wheels (b) makes things spin (c) has coloured bands (d) stores a little charge
  34. 34.True or false: a capacitor makes a beeping sound. (a) False (b) True
  35. 35.True or false: a diode lets current go one way. (a) False (b) True
  36. 36.What does a potentiometer do? (a) smooths a wobbly supply (b) senses how bright it is (c) is a resistance knob (d) stores a little charge
  37. 37.True or false: a motor turns a fan or wheels. (a) True (b) False
  38. 38.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) resistor (d) capacitor
  39. 39.🧩 Which component glows using little power? (a) capacitor (b) fuse (c) potentiometer (d) LED
  40. 40.True or false: a potentiometer senses how hot it is. (a) False (b) True

Answer key

  1. buzzer
  2. a motor
  3. blows if current is high
  4. False
  5. capacitor
  6. False
  7. thermistor
  8. smooths a wobbly supply
  9. False
  10. True
  11. True
  12. senses how hot it is
  13. resistor
  14. False
  15. capacitor
  16. has coloured bands
  17. False
  18. turns a fan or wheels
  19. fuse
  20. potentiometer
  21. False
  22. True
  23. glows using little power
  24. resistor
  25. False
  26. False
  27. store charge briefly
  28. a buzzer
  29. makes things spin
  30. LDR
  31. True
  32. False
  33. stores a little charge
  34. False
  35. True
  36. is a resistance knob
  37. True
  38. buzzer
  39. LED
  40. False

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