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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 350 · 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 part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  2. 2.True or false: a potentiometer is a resistance knob. (a) False (b) True
  3. 3.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) fuse (d) capacitor
  4. 4.True or false: a diode lets current go one way. (a) False (b) True
  5. 5.🧩 Which component makes things spin? (a) capacitor (b) LED (c) motor (d) thermistor
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  7. 7.What does a resistor do? (a) has coloured bands (b) smooths a wobbly supply (c) glows using little power (d) beeps for an alarm
  8. 8.🧩 Which component boosts a small signal? (a) buzzer (b) fuse (c) capacitor (d) transistor
  9. 9.🧩 Which component has coloured bands? (a) thermistor (b) LDR (c) resistor (d) capacitor
  10. 10.🧩 Which component makes a beeping sound? (a) LED (b) diode (c) fuse (d) buzzer
  11. 11.True or false: a fuse boosts a small signal. (a) True (b) False
  12. 12.What does a transistor do? (a) limits the current (b) boosts a small signal (c) beeps for an alarm (d) makes a beeping sound
  13. 13.🧩 Which component senses how bright it is? (a) potentiometer (b) motor (c) LDR (d) resistor
  14. 14.🧩 Which component blows if current is high? (a) fuse (b) capacitor (c) LDR (d) thermistor
  15. 15.What does a fuse do? (a) smooths a wobbly supply (b) senses how bright it is (c) makes a beeping sound (d) blows if current is high
  16. 16.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  17. 17.True or false: a transistor beeps for an alarm. (a) False (b) True
  18. 18.True or false: an LED senses how bright it is. (a) True (b) False
  19. 19.🧩 Which component lets current go one way? (a) LED (b) fuse (c) potentiometer (d) diode
  20. 20.🧩 Which component is a resistance knob? (a) capacitor (b) resistor (c) potentiometer (d) thermistor
  21. 21.🧩 Which component beeps for an alarm? (a) buzzer (b) resistor (c) LDR (d) capacitor
  22. 22.True or false: a buzzer stores a little charge. (a) False (b) True
  23. 23.🧩 Which component limits the current? (a) transistor (b) potentiometer (c) resistor (d) motor
  24. 24.What does a buzzer do? (a) stores a little charge (b) smooths a wobbly supply (c) senses how hot it is (d) makes a beeping sound
  25. 25.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  26. 26.True or false: a resistor makes a beeping sound. (a) True (b) False
  27. 27.🧩 Which component glows using little power? (a) diode (b) LED (c) fuse (d) motor
  28. 28.🧩 Which component stores a little charge? (a) potentiometer (b) LDR (c) thermistor (d) capacitor
  29. 29.What does a buzzer do? (a) glows using little power (b) makes things spin (c) lets current go one way (d) beeps for an alarm
  30. 30.True or false: a capacitor stores a little charge. (a) True (b) False
  31. 31.What does a resistor do? (a) limits the current (b) smooths a wobbly supply (c) turns a fan or wheels (d) makes things spin
  32. 32.What does a motor do? (a) makes things spin (b) is a resistance knob (c) senses how bright it is (d) glows using little power
  33. 33.True or false: an LDR makes things spin. (a) False (b) True
  34. 34.True or false: a resistor makes things spin. (a) True (b) False
  35. 35.True or false: a motor makes things spin. (a) False (b) True
  36. 36.True or false: a buzzer senses how hot it is. (a) False (b) True
  37. 37.True or false: a fuse has coloured bands. (a) True (b) False
  38. 38.🧩 Which component turns a fan or wheels? (a) thermistor (b) buzzer (c) motor (d) LDR
  39. 39.What does an LED do? (a) limits the current (b) boosts a small signal (c) glows using little power (d) lets current go one way
  40. 40.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) lets current go one way (d) turns a fan or wheels

Answer key

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

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