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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 42 · 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 limits the current? (a) resistor (b) thermistor (c) diode (d) LED
  2. 2.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) limits the current (d) makes a beeping sound
  3. 3.True or false: a capacitor stores a little charge. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  5. 5.What does a fuse do? (a) limits the current (b) glows using little power (c) blows if current is high (d) boosts a small signal
  6. 6.What does a capacitor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) limits the current (d) makes things spin
  7. 7.🧩 Which component smooths a wobbly supply? (a) diode (b) buzzer (c) LDR (d) capacitor
  8. 8.🧩 Which component stores a little charge? (a) buzzer (b) motor (c) LDR (d) capacitor
  9. 9.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  11. 11.True or false: an LDR is a resistance knob. (a) False (b) True
  12. 12.🧩 Which component senses how hot it is? (a) fuse (b) motor (c) potentiometer (d) thermistor
  13. 13.What does a buzzer do? (a) limits the current (b) lets current go one way (c) senses how hot it is (d) makes a beeping sound
  14. 14.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) capacitor (d) LED
  15. 15.What does a resistor do? (a) lets current go one way (b) glows using little power (c) beeps for an alarm (d) has coloured bands
  16. 16.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  17. 17.True or false: a fuse limits the current. (a) False (b) True
  18. 18.True or false: a motor makes things spin. (a) True (b) False
  19. 19.True or false: a potentiometer is a resistance knob. (a) False (b) True
  20. 20.What does an LDR do? (a) lets current go one way (b) senses how hot it is (c) senses how bright it is (d) smooths a wobbly supply
  21. 21.🧩 Which component blows if current is high? (a) potentiometer (b) LED (c) resistor (d) fuse
  22. 22.What does a motor do? (a) beeps for an alarm (b) blows if current is high (c) makes things spin (d) stores a little charge
  23. 23.What does an LED do? (a) limits the current (b) is a resistance knob (c) glows using little power (d) makes a beeping sound
  24. 24.True or false: an LDR senses how bright it is. (a) False (b) True
  25. 25.True or false: a motor has coloured bands. (a) True (b) False
  26. 26.What does a resistor do? (a) smooths a wobbly supply (b) senses how bright it is (c) limits the current (d) turns a fan or wheels
  27. 27.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) transistor (d) diode
  28. 28.True or false: a motor boosts a small signal. (a) False (b) True
  29. 29.What does a diode do? (a) glows using little power (b) lets current go one way (c) boosts a small signal (d) makes a beeping sound
  30. 30.🧩 Which component beeps for an alarm? (a) transistor (b) motor (c) LED (d) buzzer
  31. 31.True or false: a diode beeps for an alarm. (a) True (b) False
  32. 32.True or false: a diode lets current go one way. (a) True (b) False
  33. 33.🧩 Which component is a resistance knob? (a) potentiometer (b) fuse (c) transistor (d) resistor
  34. 34.True or false: a buzzer makes a beeping sound. (a) False (b) True
  35. 35.True or false: a diode senses how bright it is. (a) False (b) True
  36. 36.What does a capacitor do? (a) glows using little power (b) turns a fan or wheels (c) stores a little charge (d) boosts a small signal
  37. 37.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
  38. 38.What does a potentiometer do? (a) senses how hot it is (b) beeps for an alarm (c) senses how bright it is (d) is a resistance knob
  39. 39.True or false: a capacitor beeps for an alarm. (a) True (b) False
  40. 40.🧩 Which component boosts a small signal? (a) LDR (b) LED (c) buzzer (d) transistor

Answer key

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

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