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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 476 · 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.What does a fuse do? (a) stores a little charge (b) is a resistance knob (c) boosts a small signal (d) blows if current is high
  2. 2.🧩 Which component stores a little charge? (a) buzzer (b) fuse (c) LED (d) capacitor
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  4. 4.🧩 Which component senses how hot it is? (a) capacitor (b) LED (c) motor (d) thermistor
  5. 5.What does an LED do? (a) has coloured bands (b) limits the current (c) glows using little power (d) turns a fan or wheels
  6. 6.🧩 Which component makes a beeping sound? (a) transistor (b) LDR (c) capacitor (d) buzzer
  7. 7.🧩 Which component smooths a wobbly supply? (a) LED (b) resistor (c) transistor (d) capacitor
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  9. 9.What does a resistor do? (a) senses how hot it is (b) limits the current (c) senses how bright it is (d) makes a beeping sound
  10. 10.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  11. 11.🧩 Which component makes things spin? (a) thermistor (b) transistor (c) capacitor (d) motor
  12. 12.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) resistor (d) buzzer
  13. 13.🧩 Which component blows if current is high? (a) thermistor (b) diode (c) fuse (d) LED
  14. 14.True or false: a resistor makes things spin. (a) True (b) False
  15. 15.True or false: a fuse has coloured bands. (a) True (b) False
  16. 16.🧩 Which component lets current go one way? (a) resistor (b) capacitor (c) diode (d) thermistor
  17. 17.What does a potentiometer do? (a) beeps for an alarm (b) blows if current is high (c) boosts a small signal (d) is a resistance knob
  18. 18.True or false: a diode turns a fan or wheels. (a) False (b) True
  19. 19.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) makes things spin
  20. 20.🧩 Which component limits the current? (a) LED (b) resistor (c) potentiometer (d) diode
  21. 21.True or false: a transistor makes things spin. (a) False (b) True
  22. 22.True or false: a motor limits the current. (a) True (b) False
  23. 23.True or false: an LED senses how bright it is. (a) False (b) True
  24. 24.What does a thermistor do? (a) makes things spin (b) is a resistance knob (c) boosts a small signal (d) senses how hot it is
  25. 25.What does a resistor do? (a) lets current go one way (b) is a resistance knob (c) has coloured bands (d) makes a beeping sound
  26. 26.True or false: a motor is a resistance knob. (a) False (b) True
  27. 27.What does a buzzer do? (a) limits the current (b) makes things spin (c) turns a fan or wheels (d) beeps for an alarm
  28. 28.🧩 Which component turns a fan or wheels? (a) thermistor (b) buzzer (c) motor (d) resistor
  29. 29.🧩 Which component glows using little power? (a) motor (b) capacitor (c) transistor (d) LED
  30. 30.True or false: a capacitor senses how hot it is. (a) False (b) True
  31. 31.True or false: a diode lets current go one way. (a) True (b) False
  32. 32.True or false: a capacitor stores a little charge. (a) False (b) True
  33. 33.What does a diode do? (a) limits the current (b) is a resistance knob (c) lets current go one way (d) makes a beeping sound
  34. 34.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) capacitor (d) motor
  35. 35.True or false: a thermistor senses how hot it is. (a) False (b) True
  36. 36.🧩 Which component has coloured bands? (a) LDR (b) motor (c) fuse (d) resistor
  37. 37.What does a motor do? (a) has coloured bands (b) limits the current (c) makes things spin (d) smooths a wobbly supply
  38. 38.True or false: a capacitor senses how bright it is. (a) True (b) False
  39. 39.True or false: an LDR senses how hot it is. (a) False (b) True
  40. 40.What does an LDR do? (a) senses how bright it is (b) smooths a wobbly supply (c) lets current go one way (d) beeps for an alarm

Answer key

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

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