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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 100 · 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.True or false: a potentiometer limits the current. (a) True (b) False
  2. 2.True or false: a fuse stores a little charge. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  4. 4.True or false: a buzzer makes a beeping sound. (a) False (b) True
  5. 5.What does a motor do? (a) makes things spin (b) senses how hot it is (c) has coloured bands (d) makes a beeping sound
  6. 6.What does a buzzer do? (a) smooths a wobbly supply (b) beeps for an alarm (c) is a resistance knob (d) stores a little charge
  7. 7.True or false: a buzzer has coloured bands. (a) True (b) False
  8. 8.What does a thermistor do? (a) smooths a wobbly supply (b) blows if current is high (c) turns a fan or wheels (d) senses how hot it is
  9. 9.True or false: a thermistor makes a beeping sound. (a) True (b) False
  10. 10.What does a transistor do? (a) makes things spin (b) beeps for an alarm (c) boosts a small signal (d) senses how hot it is
  11. 11.What does a resistor do? (a) beeps for an alarm (b) has coloured bands (c) stores a little charge (d) turns a fan or wheels
  12. 12.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) buzzer (d) LED
  13. 13.🧩 Which component beeps for an alarm? (a) buzzer (b) transistor (c) LED (d) fuse
  14. 14.True or false: a diode lets current go one way. (a) False (b) True
  15. 15.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  16. 16.🧩 Which component limits the current? (a) potentiometer (b) thermistor (c) resistor (d) LED
  17. 17.True or false: a fuse blows if current is high. (a) True (b) False
  18. 18.True or false: a transistor turns a fan or wheels. (a) False (b) True
  19. 19.True or false: an LDR senses how bright it is. (a) False (b) True
  20. 20.What does an LED do? (a) beeps for an alarm (b) glows using little power (c) has coloured bands (d) turns a fan or wheels
  21. 21.What does a buzzer do? (a) limits the current (b) smooths a wobbly supply (c) boosts a small signal (d) makes a beeping sound
  22. 22.🧩 Which component glows using little power? (a) LED (b) transistor (c) buzzer (d) LDR
  23. 23.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  24. 24.What does a potentiometer do? (a) has coloured bands (b) turns a fan or wheels (c) is a resistance knob (d) glows using little power
  25. 25.True or false: a resistor limits the current. (a) False (b) True
  26. 26.🧩 Which component turns a fan or wheels? (a) buzzer (b) fuse (c) motor (d) potentiometer
  27. 27.True or false: an LED glows using little power. (a) True (b) False
  28. 28.True or false: a fuse limits the current. (a) True (b) False
  29. 29.True or false: a potentiometer is a resistance knob. (a) False (b) True
  30. 30.What does a capacitor do? (a) senses how hot it is (b) stores a little charge (c) has coloured bands (d) senses how bright it is
  31. 31.🧩 Which component senses how hot it is? (a) motor (b) LED (c) diode (d) thermistor
  32. 32.What does a fuse do? (a) has coloured bands (b) stores a little charge (c) limits the current (d) blows if current is high
  33. 33.True or false: a motor makes things spin. (a) False (b) True
  34. 34.What does an LDR do? (a) stores a little charge (b) blows if current is high (c) senses how bright it is (d) lets current go one way
  35. 35.🧩 Which component stores a little charge? (a) potentiometer (b) transistor (c) capacitor (d) motor
  36. 36.True or false: a resistor stores a little charge. (a) True (b) False
  37. 37.🧩 Which component makes a beeping sound? (a) potentiometer (b) LED (c) fuse (d) buzzer
  38. 38.True or false: a resistor has coloured bands. (a) True (b) False
  39. 39.True or false: a diode makes a beeping sound. (a) True (b) False
  40. 40.🧩 Which component makes things spin? (a) capacitor (b) resistor (c) LDR (d) motor

Answer key

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

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