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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 364 · 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 senses how hot it is? (a) LDR (b) thermistor (c) transistor (d) LED
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  3. 3.What does a resistor do? (a) makes a beeping sound (b) glows using little power (c) has coloured bands (d) makes things spin
  4. 4.What does a capacitor do? (a) senses how bright it is (b) boosts a small signal (c) limits the current (d) smooths a wobbly supply
  5. 5.What does an LDR do? (a) smooths a wobbly supply (b) makes a beeping sound (c) senses how bright it is (d) lets current go one way
  6. 6.🧩 Which component makes things spin? (a) LDR (b) fuse (c) motor (d) LED
  7. 7.True or false: a potentiometer is a resistance knob. (a) True (b) False
  8. 8.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  9. 9.🧩 Which component turns a fan or wheels? (a) capacitor (b) buzzer (c) motor (d) LDR
  10. 10.What does a diode do? (a) stores a little charge (b) makes a beeping sound (c) lets current go one way (d) is a resistance knob
  11. 11.🧩 Which component blows if current is high? (a) motor (b) fuse (c) transistor (d) buzzer
  12. 12.🧩 Which component limits the current? (a) buzzer (b) LED (c) LDR (d) resistor
  13. 13.What does a fuse do? (a) is a resistance knob (b) blows if current is high (c) makes a beeping sound (d) turns a fan or wheels
  14. 14.True or false: a resistor limits the current. (a) True (b) False
  15. 15.🧩 Which component stores a little charge? (a) thermistor (b) diode (c) capacitor (d) LDR
  16. 16.🧩 Which component glows using little power? (a) resistor (b) buzzer (c) LED (d) motor
  17. 17.🧩 Which component makes a beeping sound? (a) transistor (b) motor (c) buzzer (d) LDR
  18. 18.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  19. 19.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) potentiometer (d) capacitor
  20. 20.What does a thermistor do? (a) limits the current (b) boosts a small signal (c) blows if current is high (d) senses how hot it is
  21. 21.True or false: a motor makes things spin. (a) False (b) True
  22. 22.True or false: an LDR senses how bright it is. (a) False (b) True
  23. 23.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) fuse (d) resistor
  24. 24.🧩 Which component has coloured bands? (a) LED (b) resistor (c) motor (d) thermistor
  25. 25.True or false: a diode boosts a small signal. (a) False (b) True
  26. 26.True or false: a motor turns a fan or wheels. (a) False (b) True
  27. 27.True or false: a fuse blows if current is high. (a) False (b) True
  28. 28.🧩 Which component senses how bright it is? (a) diode (b) LED (c) motor (d) LDR
  29. 29.What does a buzzer do? (a) limits the current (b) turns a fan or wheels (c) lets current go one way (d) makes a beeping sound
  30. 30.True or false: a capacitor stores a little charge. (a) False (b) True
  31. 31.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) smooths a wobbly supply (d) blows if current is high
  32. 32.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) senses how hot it is (d) makes a beeping sound
  33. 33.True or false: a capacitor makes a beeping sound. (a) True (b) False
  34. 34.True or false: a buzzer beeps for an alarm. (a) False (b) True
  35. 35.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) LED (d) resistor
  36. 36.True or false: a fuse makes things spin. (a) True (b) False
  37. 37.What does a motor do? (a) beeps for an alarm (b) has coloured bands (c) lets current go one way (d) makes things spin
  38. 38.What does a capacitor do? (a) limits the current (b) has coloured bands (c) stores a little charge (d) senses how hot it is
  39. 39.True or false: a thermistor is a resistance knob. (a) True (b) False
  40. 40.True or false: an LED senses how bright it is. (a) True (b) False

Answer key

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

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