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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 80 · 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 an LED do? (a) beeps for an alarm (b) makes things spin (c) glows using little power (d) smooths a wobbly supply
  2. 2.True or false: a transistor blows if current is high. (a) False (b) True
  3. 3.True or false: a buzzer makes a beeping sound. (a) False (b) True
  4. 4.True or false: a capacitor stores a little charge. (a) True (b) False
  5. 5.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  6. 6.True or false: a resistor has coloured bands. (a) True (b) False
  7. 7.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) resistor (d) transistor
  8. 8.🧩 Which component senses how bright it is? (a) diode (b) resistor (c) fuse (d) LDR
  9. 9.🧩 Which component makes things spin? (a) buzzer (b) thermistor (c) motor (d) capacitor
  10. 10.What does an LDR do? (a) limits the current (b) senses how hot it is (c) makes a beeping sound (d) senses how bright it is
  11. 11.True or false: an LED smooths a wobbly supply. (a) False (b) True
  12. 12.What does a potentiometer do? (a) stores a little charge (b) blows if current is high (c) beeps for an alarm (d) is a resistance knob
  13. 13.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  14. 14.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  15. 15.True or false: a motor stores a little charge. (a) True (b) False
  16. 16.🧩 Which component beeps for an alarm? (a) thermistor (b) resistor (c) diode (d) buzzer
  17. 17.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) fuse (d) potentiometer
  18. 18.🧩 Which component blows if current is high? (a) motor (b) buzzer (c) fuse (d) capacitor
  19. 19.What does a motor do? (a) has coloured bands (b) stores a little charge (c) senses how hot it is (d) turns a fan or wheels
  20. 20.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  21. 21.What does a fuse do? (a) stores a little charge (b) blows if current is high (c) senses how hot it is (d) turns a fan or wheels
  22. 22.True or false: a resistor lets current go one way. (a) True (b) False
  23. 23.True or false: a transistor limits the current. (a) True (b) False
  24. 24.True or false: a potentiometer is a resistance knob. (a) False (b) True
  25. 25.🧩 Which component senses how hot it is? (a) capacitor (b) potentiometer (c) thermistor (d) resistor
  26. 26.True or false: a motor turns a fan or wheels. (a) True (b) False
  27. 27.🧩 Which component stores a little charge? (a) resistor (b) fuse (c) LDR (d) capacitor
  28. 28.True or false: a thermistor has coloured bands. (a) True (b) False
  29. 29.True or false: a buzzer senses how bright it is. (a) False (b) True
  30. 30.🧩 Which component glows using little power? (a) buzzer (b) LED (c) thermistor (d) transistor
  31. 31.🧩 Which component boosts a small signal? (a) fuse (b) transistor (c) motor (d) capacitor
  32. 32.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  33. 33.True or false: a buzzer boosts a small signal. (a) True (b) False
  34. 34.True or false: a potentiometer boosts a small signal. (a) False (b) True
  35. 35.What does a diode do? (a) makes a beeping sound (b) lets current go one way (c) limits the current (d) senses how bright it is
  36. 36.What does a motor do? (a) senses how hot it is (b) stores a little charge (c) boosts a small signal (d) makes things spin
  37. 37.🧩 Which component has coloured bands? (a) buzzer (b) diode (c) thermistor (d) resistor
  38. 38.🧩 Which component is a resistance knob? (a) potentiometer (b) capacitor (c) buzzer (d) LDR
  39. 39.What does a capacitor do? (a) beeps for an alarm (b) makes a beeping sound (c) turns a fan or wheels (d) stores a little charge
  40. 40.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) limits the current (d) lets current go one way

Answer key

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

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