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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 669 · 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) thermistor (b) potentiometer (c) capacitor (d) fuse
  2. 2.What does a thermistor do? (a) has coloured bands (b) lets current go one way (c) blows if current is high (d) senses how hot it is
  3. 3.True or false: a buzzer beeps for an alarm. (a) False (b) True
  4. 4.What does a buzzer do? (a) turns a fan or wheels (b) glows using little power (c) senses how bright it is (d) makes a beeping sound
  5. 5.🧩 Which component glows using little power? (a) LED (b) buzzer (c) LDR (d) diode
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  8. 8.🧩 Which component makes things spin? (a) buzzer (b) transistor (c) capacitor (d) motor
  9. 9.True or false: an LED makes a beeping sound. (a) False (b) True
  10. 10.True or false: a diode makes things spin. (a) False (b) True
  11. 11.True or false: a potentiometer blows if current is high. (a) True (b) False
  12. 12.True or false: a transistor beeps for an alarm. (a) True (b) False
  13. 13.🧩 Which component senses how hot it is? (a) LDR (b) potentiometer (c) capacitor (d) thermistor
  14. 14.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  15. 15.🧩 Which component has coloured bands? (a) LDR (b) thermistor (c) diode (d) resistor
  16. 16.🧩 Which component is a resistance knob? (a) buzzer (b) fuse (c) thermistor (d) potentiometer
  17. 17.What does a resistor do? (a) senses how hot it is (b) stores a little charge (c) turns a fan or wheels (d) has coloured bands
  18. 18.True or false: a capacitor stores a little charge. (a) True (b) False
  19. 19.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) senses how hot it is (d) blows if current is high
  20. 20.True or false: a motor makes things spin. (a) False (b) True
  21. 21.What does a diode do? (a) boosts a small signal (b) senses how bright it is (c) limits the current (d) lets current go one way
  22. 22.🧩 Which component makes a beeping sound? (a) LDR (b) buzzer (c) thermistor (d) LED
  23. 23.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  24. 24.What does a fuse do? (a) stores a little charge (b) limits the current (c) boosts a small signal (d) blows if current is high
  25. 25.What does a transistor do? (a) senses how bright it is (b) makes things spin (c) blows if current is high (d) boosts a small signal
  26. 26.True or false: a fuse turns a fan or wheels. (a) True (b) False
  27. 27.True or false: a transistor lets current go one way. (a) True (b) False
  28. 28.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) lets current go one way (d) boosts a small signal
  29. 29.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) capacitor (d) buzzer
  30. 30.True or false: a potentiometer makes things spin. (a) True (b) False
  31. 31.True or false: a potentiometer is a resistance knob. (a) True (b) False
  32. 32.🧩 Which component boosts a small signal? (a) buzzer (b) LDR (c) resistor (d) transistor
  33. 33.True or false: a diode lets current go one way. (a) False (b) True
  34. 34.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) buzzer (d) capacitor
  35. 35.🧩 Which component lets current go one way? (a) fuse (b) transistor (c) motor (d) diode
  36. 36.What does a capacitor do? (a) lets current go one way (b) makes things spin (c) smooths a wobbly supply (d) boosts a small signal
  37. 37.True or false: a motor has coloured bands. (a) False (b) True
  38. 38.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) transistor (d) resistor
  39. 39.True or false: a fuse senses how hot it is. (a) False (b) True
  40. 40.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) thermistor (d) LDR

Answer key

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

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