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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 686 · 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 beeps for an alarm? (a) transistor (b) motor (c) buzzer (d) capacitor
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  3. 3.What does a resistor do? (a) limits the current (b) senses how bright it is (c) blows if current is high (d) turns a fan or wheels
  4. 4.True or false: a buzzer glows using little power. (a) False (b) True
  5. 5.🧩 Which component turns a fan or wheels? (a) diode (b) buzzer (c) fuse (d) motor
  6. 6.🧩 Which component is a resistance knob? (a) diode (b) resistor (c) LDR (d) potentiometer
  7. 7.🧩 Which component blows if current is high? (a) LED (b) LDR (c) motor (d) fuse
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  9. 9.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  10. 10.True or false: a resistor has coloured bands. (a) False (b) True
  11. 11.🧩 Which component stores a little charge? (a) potentiometer (b) LDR (c) capacitor (d) transistor
  12. 12.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) transistor (d) diode
  13. 13.True or false: an LDR lets current go one way. (a) True (b) False
  14. 14.What does a fuse do? (a) glows using little power (b) makes things spin (c) makes a beeping sound (d) blows if current is high
  15. 15.🧩 Which component limits the current? (a) resistor (b) fuse (c) LDR (d) transistor
  16. 16.True or false: a capacitor stores a little charge. (a) False (b) True
  17. 17.What does a transistor do? (a) stores a little charge (b) boosts a small signal (c) glows using little power (d) senses how hot it is
  18. 18.What does a capacitor do? (a) lets current go one way (b) smooths a wobbly supply (c) blows if current is high (d) is a resistance knob
  19. 19.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) stores a little charge (d) is a resistance knob
  20. 20.What does a diode do? (a) lets current go one way (b) smooths a wobbly supply (c) glows using little power (d) is a resistance knob
  21. 21.True or false: a buzzer boosts a small signal. (a) False (b) True
  22. 22.What does an LDR do? (a) has coloured bands (b) stores a little charge (c) senses how bright it is (d) makes things spin
  23. 23.🧩 Which component lets current go one way? (a) fuse (b) diode (c) capacitor (d) resistor
  24. 24.True or false: a motor turns a fan or wheels. (a) False (b) True
  25. 25.What does a potentiometer do? (a) blows if current is high (b) limits the current (c) has coloured bands (d) is a resistance knob
  26. 26.🧩 Which component makes things spin? (a) LED (b) potentiometer (c) motor (d) thermistor
  27. 27.True or false: a capacitor makes a beeping sound. (a) False (b) True
  28. 28.True or false: a motor has coloured bands. (a) False (b) True
  29. 29.True or false: a resistor blows if current is high. (a) False (b) True
  30. 30.True or false: a thermistor blows if current is high. (a) True (b) False
  31. 31.What does an LED do? (a) senses how hot it is (b) is a resistance knob (c) glows using little power (d) makes a beeping sound
  32. 32.True or false: a buzzer makes a beeping sound. (a) False (b) True
  33. 33.True or false: a capacitor glows using little power. (a) True (b) False
  34. 34.True or false: a buzzer makes things spin. (a) True (b) False
  35. 35.True or false: a resistor limits the current. (a) True (b) False
  36. 36.True or false: a diode lets current go one way. (a) True (b) False
  37. 37.🧩 Which component smooths a wobbly supply? (a) diode (b) buzzer (c) capacitor (d) LDR
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.True or false: an LDR makes a beeping sound. (a) True (b) False
  40. 40.What does a capacitor do? (a) senses how bright it is (b) has coloured bands (c) blows if current is high (d) stores a little charge

Answer key

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

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