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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 150 · 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 buzzer beeps for an alarm. (a) True (b) False
  2. 2.🧩 Which component stores a little charge? (a) buzzer (b) LDR (c) capacitor (d) transistor
  3. 3.True or false: a motor lets current go one way. (a) False (b) True
  4. 4.What does a buzzer do? (a) is a resistance knob (b) boosts a small signal (c) blows if current is high (d) makes a beeping sound
  5. 5.True or false: a motor makes things spin. (a) True (b) False
  6. 6.What does a motor do? (a) blows if current is high (b) makes things spin (c) boosts a small signal (d) senses how bright it is
  7. 7.🧩 Which component makes things spin? (a) motor (b) diode (c) fuse (d) thermistor
  8. 8.🧩 Which component is a resistance knob? (a) LDR (b) LED (c) potentiometer (d) diode
  9. 9.True or false: a motor boosts a small signal. (a) False (b) True
  10. 10.🧩 Which component senses how bright it is? (a) buzzer (b) resistor (c) potentiometer (d) LDR
  11. 11.What does a resistor do? (a) senses how bright it is (b) glows using little power (c) boosts a small signal (d) has coloured bands
  12. 12.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  13. 13.What does an LDR do? (a) senses how bright it is (b) beeps for an alarm (c) lets current go one way (d) boosts a small signal
  14. 14.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  15. 15.🧩 Which component limits the current? (a) motor (b) capacitor (c) resistor (d) thermistor
  16. 16.What does an LED do? (a) senses how hot it is (b) makes a beeping sound (c) glows using little power (d) boosts a small signal
  17. 17.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) resistor (d) LDR
  18. 18.What does a potentiometer do? (a) smooths a wobbly supply (b) has coloured bands (c) is a resistance knob (d) limits the current
  19. 19.True or false: a transistor makes a beeping sound. (a) True (b) False
  20. 20.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  21. 21.🧩 Which component has coloured bands? (a) LED (b) buzzer (c) diode (d) resistor
  22. 22.True or false: a potentiometer glows using little power. (a) True (b) False
  23. 23.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) resistor (d) diode
  24. 24.True or false: a buzzer makes things spin. (a) True (b) False
  25. 25.What does a capacitor do? (a) senses how hot it is (b) turns a fan or wheels (c) limits the current (d) smooths a wobbly supply
  26. 26.🧩 Which component glows using little power? (a) diode (b) LED (c) buzzer (d) resistor
  27. 27.True or false: a resistor blows if current is high. (a) False (b) True
  28. 28.True or false: a capacitor stores a little charge. (a) False (b) True
  29. 29.🧩 Which component smooths a wobbly supply? (a) buzzer (b) fuse (c) capacitor (d) diode
  30. 30.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) is a resistance knob (d) turns a fan or wheels
  31. 31.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) LDR (d) transistor
  32. 32.True or false: a capacitor has coloured bands. (a) True (b) False
  33. 33.True or false: a transistor limits the current. (a) False (b) True
  34. 34.True or false: a thermistor makes a beeping sound. (a) False (b) True
  35. 35.True or false: an LDR makes things spin. (a) True (b) False
  36. 36.What does a thermistor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) glows using little power (d) senses how hot it is
  37. 37.True or false: a motor turns a fan or wheels. (a) False (b) True
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.True or false: a potentiometer is a resistance knob. (a) True (b) False
  40. 40.What does a fuse do? (a) senses how bright it is (b) senses how hot it is (c) blows if current is high (d) limits the current

Answer key

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

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