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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 521 · 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 smooths a wobbly supply? (a) motor (b) capacitor (c) thermistor (d) diode
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  3. 3.What does a buzzer do? (a) glows using little power (b) beeps for an alarm (c) stores a little charge (d) senses how bright it is
  4. 4.True or false: an LDR senses how bright it is. (a) True (b) False
  5. 5.True or false: a fuse blows if current is high. (a) True (b) False
  6. 6.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) diode (d) motor
  7. 7.What does a resistor do? (a) glows using little power (b) has coloured bands (c) blows if current is high (d) turns a fan or wheels
  8. 8.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) fuse (d) capacitor
  9. 9.What does an LDR do? (a) senses how hot it is (b) smooths a wobbly supply (c) turns a fan or wheels (d) senses how bright it is
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  11. 11.True or false: a motor smooths a wobbly supply. (a) True (b) False
  12. 12.True or false: a capacitor glows using little power. (a) True (b) False
  13. 13.What does a fuse do? (a) smooths a wobbly supply (b) limits the current (c) blows if current is high (d) makes things spin
  14. 14.🧩 Which component stores a little charge? (a) thermistor (b) LDR (c) diode (d) capacitor
  15. 15.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  16. 16.True or false: a resistor senses how hot it is. (a) True (b) False
  17. 17.What does a potentiometer do? (a) has coloured bands (b) turns a fan or wheels (c) is a resistance knob (d) makes a beeping sound
  18. 18.What does a transistor do? (a) stores a little charge (b) has coloured bands (c) senses how bright it is (d) boosts a small signal
  19. 19.True or false: an LED boosts a small signal. (a) False (b) True
  20. 20.True or false: an LDR lets current go one way. (a) False (b) True
  21. 21.What does a thermistor do? (a) senses how hot it is (b) has coloured bands (c) senses how bright it is (d) glows using little power
  22. 22.What does a capacitor do? (a) beeps for an alarm (b) senses how hot it is (c) limits the current (d) stores a little charge
  23. 23.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  24. 24.True or false: a resistor limits the current. (a) False (b) True
  25. 25.🧩 Which component limits the current? (a) potentiometer (b) diode (c) buzzer (d) resistor
  26. 26.True or false: a fuse boosts a small signal. (a) False (b) True
  27. 27.True or false: a capacitor lets current go one way. (a) True (b) False
  28. 28.True or false: a motor turns a fan or wheels. (a) True (b) False
  29. 29.🧩 Which component glows using little power? (a) transistor (b) LED (c) fuse (d) diode
  30. 30.True or false: an LED senses how hot it is. (a) False (b) True
  31. 31.🧩 Which component blows if current is high? (a) buzzer (b) capacitor (c) resistor (d) fuse
  32. 32.🧩 Which component blows if current is high? (a) LDR (b) buzzer (c) potentiometer (d) fuse
  33. 33.🧩 Which component beeps for an alarm? (a) fuse (b) LDR (c) transistor (d) buzzer
  34. 34.True or false: a capacitor stores a little charge. (a) False (b) True
  35. 35.True or false: a potentiometer is a resistance knob. (a) False (b) True
  36. 36.True or false: a capacitor is a resistance knob. (a) False (b) True
  37. 37.True or false: a motor blows if current is high. (a) False (b) True
  38. 38.What does a motor do? (a) senses how hot it is (b) senses how bright it is (c) makes things spin (d) smooths a wobbly supply
  39. 39.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) thermistor (d) LED
  40. 40.What does a motor do? (a) boosts a small signal (b) has coloured bands (c) is a resistance knob (d) turns a fan or wheels

Answer key

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

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