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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 327 · 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.True or false: a fuse blows if current is high. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  4. 4.True or false: a diode has coloured bands. (a) True (b) False
  5. 5.🧩 Which component makes things spin? (a) LED (b) transistor (c) diode (d) motor
  6. 6.🧩 Which component glows using little power? (a) buzzer (b) transistor (c) LDR (d) LED
  7. 7.True or false: a potentiometer is a resistance knob. (a) True (b) False
  8. 8.What does a thermistor do? (a) smooths a wobbly supply (b) senses how bright it is (c) senses how hot it is (d) makes things spin
  9. 9.What does an LDR do? (a) makes a beeping sound (b) is a resistance knob (c) boosts a small signal (d) senses how bright it is
  10. 10.What does a capacitor do? (a) glows using little power (b) blows if current is high (c) senses how hot it is (d) stores a little charge
  11. 11.🧩 Which component has coloured bands? (a) resistor (b) LED (c) transistor (d) thermistor
  12. 12.🧩 Which component is a resistance knob? (a) fuse (b) thermistor (c) motor (d) potentiometer
  13. 13.What does a fuse do? (a) blows if current is high (b) limits the current (c) stores a little charge (d) makes a beeping sound
  14. 14.True or false: a motor smooths a wobbly supply. (a) False (b) True
  15. 15.True or false: a motor has coloured bands. (a) True (b) False
  16. 16.🧩 Which component stores a little charge? (a) fuse (b) thermistor (c) LED (d) capacitor
  17. 17.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  18. 18.True or false: a thermistor glows using little power. (a) True (b) False
  19. 19.🧩 Which component makes a beeping sound? (a) fuse (b) capacitor (c) LED (d) buzzer
  20. 20.True or false: a fuse has coloured bands. (a) False (b) True
  21. 21.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  22. 22.What does a buzzer do? (a) makes a beeping sound (b) glows using little power (c) limits the current (d) senses how bright it is
  23. 23.🧩 Which component boosts a small signal? (a) diode (b) resistor (c) transistor (d) capacitor
  24. 24.What does a potentiometer do? (a) boosts a small signal (b) has coloured bands (c) is a resistance knob (d) stores a little charge
  25. 25.🧩 Which component senses how hot it is? (a) diode (b) capacitor (c) buzzer (d) thermistor
  26. 26.🧩 Which component senses how bright it is? (a) potentiometer (b) capacitor (c) transistor (d) LDR
  27. 27.True or false: a resistor limits the current. (a) False (b) True
  28. 28.What does a resistor do? (a) blows if current is high (b) senses how hot it is (c) limits the current (d) smooths a wobbly supply
  29. 29.True or false: an LED has coloured bands. (a) True (b) False
  30. 30.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) transistor (d) resistor
  31. 31.True or false: a resistor makes a beeping sound. (a) False (b) True
  32. 32.What does a motor do? (a) senses how hot it is (b) boosts a small signal (c) glows using little power (d) turns a fan or wheels
  33. 33.True or false: an LED boosts a small signal. (a) False (b) True
  34. 34.True or false: an LDR senses how bright it is. (a) False (b) True
  35. 35.True or false: a capacitor stores a little charge. (a) True (b) False
  36. 36.What does a diode do? (a) lets current go one way (b) beeps for an alarm (c) has coloured bands (d) senses how hot it is
  37. 37.True or false: a capacitor senses how bright it is. (a) True (b) False
  38. 38.True or false: a resistor is a resistance knob. (a) True (b) False
  39. 39.True or false: an LDR is a resistance knob. (a) False (b) True
  40. 40.True or false: a motor lets current go one way. (a) False (b) True

Answer key

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

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