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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 485 · 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) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  2. 2.What does a thermistor do? (a) makes a beeping sound (b) turns a fan or wheels (c) senses how hot it is (d) smooths a wobbly supply
  3. 3.🧩 Which component is a resistance knob? (a) buzzer (b) LDR (c) potentiometer (d) capacitor
  4. 4.True or false: a resistor blows if current is high. (a) False (b) True
  5. 5.🧩 Which component limits the current? (a) thermistor (b) resistor (c) capacitor (d) potentiometer
  6. 6.🧩 Which component boosts a small signal? (a) buzzer (b) potentiometer (c) thermistor (d) transistor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  8. 8.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) has coloured bands (d) turns a fan or wheels
  9. 9.What does a transistor do? (a) makes things spin (b) limits the current (c) boosts a small signal (d) has coloured bands
  10. 10.True or false: an LED blows if current is high. (a) False (b) True
  11. 11.True or false: a fuse blows if current is high. (a) False (b) True
  12. 12.True or false: a thermistor senses how bright it is. (a) True (b) False
  13. 13.What does an LED do? (a) makes things spin (b) smooths a wobbly supply (c) senses how bright it is (d) glows using little power
  14. 14.🧩 Which component senses how hot it is? (a) potentiometer (b) transistor (c) LDR (d) thermistor
  15. 15.What does a fuse do? (a) makes a beeping sound (b) limits the current (c) senses how bright it is (d) blows if current is high
  16. 16.True or false: an LED glows using little power. (a) False (b) True
  17. 17.🧩 Which component makes things spin? (a) thermistor (b) LDR (c) motor (d) capacitor
  18. 18.True or false: a transistor boosts a small signal. (a) True (b) False
  19. 19.What does a potentiometer do? (a) boosts a small signal (b) smooths a wobbly supply (c) makes a beeping sound (d) is a resistance knob
  20. 20.True or false: an LED turns a fan or wheels. (a) True (b) False
  21. 21.What does a diode do? (a) beeps for an alarm (b) senses how bright it is (c) limits the current (d) lets current go one way
  22. 22.🧩 Which component senses how bright it is? (a) motor (b) LED (c) capacitor (d) LDR
  23. 23.True or false: an LED boosts a small signal. (a) True (b) False
  24. 24.True or false: a resistor has coloured bands. (a) True (b) False
  25. 25.True or false: a thermistor stores a little charge. (a) False (b) True
  26. 26.🧩 Which component makes a beeping sound? (a) diode (b) LDR (c) buzzer (d) fuse
  27. 27.True or false: a diode blows if current is high. (a) True (b) False
  28. 28.What does a motor do? (a) boosts a small signal (b) blows if current is high (c) makes a beeping sound (d) turns a fan or wheels
  29. 29.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) beeps for an alarm (d) makes things spin
  30. 30.🧩 Which component has coloured bands? (a) diode (b) motor (c) resistor (d) LED
  31. 31.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  32. 32.True or false: a capacitor stores a little charge. (a) False (b) True
  33. 33.True or false: an LED has coloured bands. (a) True (b) False
  34. 34.What does a resistor do? (a) lets current go one way (b) makes things spin (c) limits the current (d) makes a beeping sound
  35. 35.True or false: a thermistor limits the current. (a) False (b) True
  36. 36.True or false: a thermistor boosts a small signal. (a) False (b) True
  37. 37.🧩 Which component stores a little charge? (a) LDR (b) buzzer (c) resistor (d) capacitor
  38. 38.🧩 Which component smooths a wobbly supply? (a) motor (b) thermistor (c) LDR (d) capacitor
  39. 39.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  40. 40.True or false: a transistor lets current go one way. (a) False (b) True

Answer key

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

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