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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 412 · 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) senses how bright it is (b) has coloured bands (c) blows if current is high (d) turns a fan or wheels
  2. 2.🧩 Which component senses how bright it is? (a) fuse (b) thermistor (c) motor (d) LDR
  3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  4. 4.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  6. 6.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  7. 7.🧩 Which component limits the current? (a) resistor (b) diode (c) capacitor (d) LED
  8. 8.True or false: a motor smooths a wobbly supply. (a) True (b) False
  9. 9.What does a resistor do? (a) makes things spin (b) glows using little power (c) smooths a wobbly supply (d) limits the current
  10. 10.True or false: a resistor lets current go one way. (a) True (b) False
  11. 11.What does an LDR do? (a) blows if current is high (b) senses how bright it is (c) boosts a small signal (d) makes a beeping sound
  12. 12.True or false: a capacitor limits the current. (a) True (b) False
  13. 13.What does a diode do? (a) glows using little power (b) senses how hot it is (c) stores a little charge (d) lets current go one way
  14. 14.True or false: a potentiometer stores a little charge. (a) True (b) False
  15. 15.True or false: an LED senses how bright it is. (a) True (b) False
  16. 16.🧩 Which component makes a beeping sound? (a) LDR (b) capacitor (c) LED (d) buzzer
  17. 17.What does a transistor do? (a) senses how hot it is (b) is a resistance knob (c) boosts a small signal (d) smooths a wobbly supply
  18. 18.What does a thermistor do? (a) stores a little charge (b) beeps for an alarm (c) senses how hot it is (d) is a resistance knob
  19. 19.True or false: a buzzer makes a beeping sound. (a) False (b) True
  20. 20.What does a potentiometer do? (a) has coloured bands (b) blows if current is high (c) is a resistance knob (d) smooths a wobbly supply
  21. 21.🧩 Which component boosts a small signal? (a) diode (b) capacitor (c) resistor (d) transistor
  22. 22.🧩 Which component beeps for an alarm? (a) motor (b) LDR (c) buzzer (d) thermistor
  23. 23.True or false: an LDR senses how bright it is. (a) False (b) True
  24. 24.🧩 Which component has coloured bands? (a) capacitor (b) thermistor (c) LED (d) resistor
  25. 25.What does an LED do? (a) limits the current (b) glows using little power (c) blows if current is high (d) makes things spin
  26. 26.True or false: a buzzer beeps for an alarm. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) LED (d) fuse
  28. 28.True or false: a capacitor stores a little charge. (a) False (b) True
  29. 29.🧩 Which component makes things spin? (a) capacitor (b) buzzer (c) transistor (d) motor
  30. 30.True or false: a resistor has coloured bands. (a) True (b) False
  31. 31.True or false: a capacitor blows if current is high. (a) True (b) False
  32. 32.True or false: a capacitor has coloured bands. (a) False (b) True
  33. 33.🧩 Which component smooths a wobbly supply? (a) motor (b) thermistor (c) buzzer (d) capacitor
  34. 34.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  35. 35.🧩 Which component turns a fan or wheels? (a) potentiometer (b) resistor (c) motor (d) transistor
  36. 36.True or false: a motor turns a fan or wheels. (a) True (b) False
  37. 37.True or false: a motor blows if current is high. (a) False (b) True
  38. 38.What does a capacitor do? (a) senses how hot it is (b) blows if current is high (c) is a resistance knob (d) stores a little charge
  39. 39.True or false: a transistor boosts a small signal. (a) True (b) False
  40. 40.True or false: a capacitor lets current go one way. (a) True (b) False

Answer key

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

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