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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 620 · 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 part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  2. 2.What does a fuse do? (a) makes a beeping sound (b) smooths a wobbly supply (c) beeps for an alarm (d) blows if current is high
  3. 3.🧩 Which component makes a beeping sound? (a) capacitor (b) diode (c) buzzer (d) motor
  4. 4.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  5. 5.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  6. 6.🧩 Which component has coloured bands? (a) transistor (b) LDR (c) resistor (d) thermistor
  7. 7.True or false: a fuse is a resistance knob. (a) False (b) True
  8. 8.True or false: a buzzer beeps for an alarm. (a) True (b) False
  9. 9.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) makes a beeping sound (d) makes things spin
  10. 10.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) fuse (d) resistor
  11. 11.True or false: a thermistor senses how hot it is. (a) True (b) False
  12. 12.True or false: a potentiometer is a resistance knob. (a) True (b) False
  13. 13.🧩 Which component boosts a small signal? (a) LED (b) motor (c) transistor (d) diode
  14. 14.🧩 Which component senses how bright it is? (a) motor (b) thermistor (c) resistor (d) LDR
  15. 15.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) LDR (d) buzzer
  16. 16.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) is a resistance knob (d) beeps for an alarm
  17. 17.What does an LDR do? (a) senses how bright it is (b) smooths a wobbly supply (c) boosts a small signal (d) beeps for an alarm
  18. 18.True or false: a fuse stores a little charge. (a) True (b) False
  19. 19.True or false: a motor glows using little power. (a) False (b) True
  20. 20.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  21. 21.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) thermistor (d) LDR
  22. 22.What does a buzzer do? (a) makes a beeping sound (b) blows if current is high (c) is a resistance knob (d) stores a little charge
  23. 23.What does a buzzer do? (a) has coloured bands (b) blows if current is high (c) senses how bright it is (d) beeps for an alarm
  24. 24.What does a resistor do? (a) makes things spin (b) senses how bright it is (c) limits the current (d) lets current go one way
  25. 25.What does a resistor do? (a) blows if current is high (b) glows using little power (c) has coloured bands (d) smooths a wobbly supply
  26. 26.🧩 Which component limits the current? (a) resistor (b) fuse (c) motor (d) LED
  27. 27.🧩 Which component stores a little charge? (a) resistor (b) buzzer (c) thermistor (d) capacitor
  28. 28.🧩 Which component is a resistance knob? (a) motor (b) buzzer (c) potentiometer (d) fuse
  29. 29.What does a motor do? (a) senses how hot it is (b) senses how bright it is (c) lets current go one way (d) turns a fan or wheels
  30. 30.🧩 Which component makes things spin? (a) capacitor (b) thermistor (c) LDR (d) motor
  31. 31.True or false: a transistor boosts a small signal. (a) True (b) False
  32. 32.🧩 Which component lets current go one way? (a) diode (b) LDR (c) resistor (d) LED
  33. 33.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) capacitor (d) buzzer
  34. 34.True or false: an LDR senses how bright it is. (a) True (b) False
  35. 35.True or false: a resistor has coloured bands. (a) True (b) False
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.True or false: an LED glows using little power. (a) False (b) True
  38. 38.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  39. 39.What does a capacitor do? (a) senses how hot it is (b) smooths a wobbly supply (c) boosts a small signal (d) has coloured bands
  40. 40.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer

Answer key

  1. a buzzer
  2. blows if current is high
  3. buzzer
  4. store charge briefly
  5. a motor
  6. resistor
  7. False
  8. True
  9. is a resistance knob
  10. capacitor
  11. True
  12. True
  13. transistor
  14. LDR
  15. thermistor
  16. boosts a small signal
  17. senses how bright it is
  18. False
  19. False
  20. True
  21. fuse
  22. makes a beeping sound
  23. beeps for an alarm
  24. limits the current
  25. has coloured bands
  26. resistor
  27. capacitor
  28. potentiometer
  29. turns a fan or wheels
  30. motor
  31. True
  32. diode
  33. motor
  34. True
  35. True
  36. True
  37. True
  38. False
  39. smooths a wobbly supply
  40. a buzzer

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