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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 292 · 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 has coloured bands. (a) False (b) True
  2. 2.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) capacitor (d) motor
  3. 3.True or false: a motor stores a little charge. (a) False (b) True
  4. 4.True or false: a diode senses how bright it is. (a) False (b) True
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  6. 6.True or false: a diode lets current go one way. (a) False (b) True
  7. 7.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  8. 8.What does an LED do? (a) is a resistance knob (b) limits the current (c) glows using little power (d) blows if current is high
  9. 9.True or false: a buzzer beeps for an alarm. (a) False (b) True
  10. 10.What does a fuse do? (a) glows using little power (b) boosts a small signal (c) senses how bright it is (d) blows if current is high
  11. 11.🧩 Which component beeps for an alarm? (a) thermistor (b) resistor (c) buzzer (d) LED
  12. 12.True or false: a motor senses how hot it is. (a) True (b) False
  13. 13.True or false: an LDR senses how bright it is. (a) True (b) False
  14. 14.What does a motor do? (a) turns a fan or wheels (b) blows if current is high (c) smooths a wobbly supply (d) senses how bright it is
  15. 15.🧩 Which component blows if current is high? (a) motor (b) transistor (c) resistor (d) fuse
  16. 16.🧩 Which component is a resistance knob? (a) motor (b) fuse (c) potentiometer (d) LDR
  17. 17.🧩 Which component smooths a wobbly supply? (a) buzzer (b) fuse (c) diode (d) capacitor
  18. 18.🧩 Which component has coloured bands? (a) capacitor (b) LDR (c) resistor (d) LED
  19. 19.🧩 Which component makes things spin? (a) capacitor (b) fuse (c) motor (d) resistor
  20. 20.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) potentiometer (d) fuse
  21. 21.True or false: a transistor turns a fan or wheels. (a) False (b) True
  22. 22.🧩 Which component senses how bright it is? (a) potentiometer (b) fuse (c) LED (d) LDR
  23. 23.🧩 Which component glows using little power? (a) diode (b) LED (c) resistor (d) capacitor
  24. 24.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) LED (d) LDR
  25. 25.True or false: a fuse makes things spin. (a) False (b) True
  26. 26.🧩 Which component limits the current? (a) motor (b) resistor (c) LDR (d) transistor
  27. 27.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  28. 28.True or false: a fuse turns a fan or wheels. (a) True (b) False
  29. 29.True or false: a buzzer makes a beeping sound. (a) False (b) True
  30. 30.True or false: a capacitor makes a beeping sound. (a) False (b) True
  31. 31.True or false: a buzzer glows using little power. (a) False (b) True
  32. 32.🧩 Which component senses how hot it is? (a) diode (b) LDR (c) thermistor (d) LED
  33. 33.What does a capacitor do? (a) senses how hot it is (b) boosts a small signal (c) smooths a wobbly supply (d) makes a beeping sound
  34. 34.True or false: a transistor boosts a small signal. (a) False (b) True
  35. 35.🧩 Which component stores a little charge? (a) motor (b) diode (c) transistor (d) capacitor
  36. 36.What does an LDR do? (a) blows if current is high (b) senses how bright it is (c) lets current go one way (d) stores a little charge
  37. 37.🧩 Which component makes a beeping sound? (a) LDR (b) thermistor (c) resistor (d) buzzer
  38. 38.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) has coloured bands (d) smooths a wobbly supply
  39. 39.What does a buzzer do? (a) boosts a small signal (b) makes things spin (c) beeps for an alarm (d) senses how hot it is
  40. 40.What does a resistor do? (a) stores a little charge (b) limits the current (c) turns a fan or wheels (d) is a resistance knob

Answer key

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

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