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Electronics Worksheet: Electronic Components

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

Answer key

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

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