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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 1 · 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.What does a potentiometer do? (a) has coloured bands (b) makes a beeping sound (c) is a resistance knob (d) makes things spin
  2. 2.True or false: a buzzer beeps for an alarm. (a) True (b) False
  3. 3.What does a buzzer do? (a) has coloured bands (b) senses how bright it is (c) makes a beeping sound (d) blows if current is high
  4. 4.What does a capacitor do? (a) turns a fan or wheels (b) stores a little charge (c) has coloured bands (d) blows if current is high
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  6. 6.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  7. 7.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  8. 8.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  9. 9.True or false: a diode boosts a small signal. (a) True (b) False
  10. 10.🧩 Which component makes things spin? (a) LED (b) potentiometer (c) buzzer (d) motor
  11. 11.What does a diode do? (a) senses how hot it is (b) stores a little charge (c) limits the current (d) lets current go one way
  12. 12.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) blows if current is high (d) senses how bright it is
  13. 13.True or false: a potentiometer is a resistance knob. (a) False (b) True
  14. 14.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) transistor (d) LED
  15. 15.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) resistor (d) motor
  16. 16.True or false: a capacitor is a resistance knob. (a) True (b) False
  17. 17.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) potentiometer (d) transistor
  18. 18.True or false: a transistor boosts a small signal. (a) False (b) True
  19. 19.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) diode (d) motor
  20. 20.What does a capacitor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) makes things spin (d) glows using little power
  21. 21.What does a fuse do? (a) smooths a wobbly supply (b) is a resistance knob (c) blows if current is high (d) makes a beeping sound
  22. 22.What does a motor do? (a) turns a fan or wheels (b) has coloured bands (c) smooths a wobbly supply (d) is a resistance knob
  23. 23.True or false: a motor turns a fan or wheels. (a) True (b) False
  24. 24.True or false: a diode limits the current. (a) True (b) False
  25. 25.What does an LDR do? (a) blows if current is high (b) has coloured bands (c) stores a little charge (d) senses how bright it is
  26. 26.True or false: a motor smooths a wobbly supply. (a) False (b) True
  27. 27.What does a motor do? (a) lets current go one way (b) beeps for an alarm (c) makes things spin (d) has coloured bands
  28. 28.What does a buzzer do? (a) lets current go one way (b) turns a fan or wheels (c) beeps for an alarm (d) senses how hot it is
  29. 29.What does an LED do? (a) is a resistance knob (b) glows using little power (c) makes a beeping sound (d) limits the current
  30. 30.True or false: a resistor is a resistance knob. (a) True (b) False
  31. 31.True or false: a resistor makes things spin. (a) False (b) True
  32. 32.What does a transistor do? (a) blows if current is high (b) senses how bright it is (c) boosts a small signal (d) stores a little charge
  33. 33.🧩 Which component limits the current? (a) thermistor (b) resistor (c) motor (d) transistor
  34. 34.🧩 Which component senses how hot it is? (a) transistor (b) diode (c) thermistor (d) resistor
  35. 35.True or false: a buzzer makes a beeping sound. (a) False (b) True
  36. 36.🧩 Which component glows using little power? (a) thermistor (b) transistor (c) diode (d) LED
  37. 37.True or false: an LDR turns a fan or wheels. (a) True (b) False
  38. 38.True or false: an LED glows using little power. (a) True (b) False
  39. 39.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  40. 40.True or false: a thermistor limits the current. (a) False (b) True

Answer key

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

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