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Electronics Worksheet: Electronic Components

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

Answer key

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

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