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Electronics Worksheet: Electronic Components

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

Answer key

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

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