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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 562 · 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 glows using little power? (a) fuse (b) buzzer (c) LDR (d) LED
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  3. 3.🧩 Which component limits the current? (a) thermistor (b) capacitor (c) resistor (d) buzzer
  4. 4.True or false: a diode senses how hot it is. (a) False (b) True
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  6. 6.True or false: a diode stores a little charge. (a) True (b) False
  7. 7.🧩 Which component boosts a small signal? (a) motor (b) resistor (c) transistor (d) diode
  8. 8.True or false: an LDR limits the current. (a) True (b) False
  9. 9.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  10. 10.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) diode (d) resistor
  11. 11.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) LDR (d) diode
  12. 12.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) blows if current is high (d) turns a fan or wheels
  13. 13.🧩 Which component beeps for an alarm? (a) transistor (b) diode (c) buzzer (d) thermistor
  14. 14.What does a buzzer do? (a) turns a fan or wheels (b) limits the current (c) glows using little power (d) beeps for an alarm
  15. 15.True or false: an LED has coloured bands. (a) True (b) False
  16. 16.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  17. 17.True or false: a motor senses how bright it is. (a) True (b) False
  18. 18.True or false: a capacitor senses how bright it is. (a) False (b) True
  19. 19.True or false: a transistor lets current go one way. (a) False (b) True
  20. 20.True or false: a potentiometer glows using little power. (a) True (b) False
  21. 21.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) LED (d) diode
  22. 22.True or false: a buzzer stores a little charge. (a) False (b) True
  23. 23.True or false: a motor beeps for an alarm. (a) False (b) True
  24. 24.True or false: an LED is a resistance knob. (a) False (b) True
  25. 25.True or false: a capacitor stores a little charge. (a) False (b) True
  26. 26.True or false: a motor makes things spin. (a) True (b) False
  27. 27.What does a transistor do? (a) boosts a small signal (b) beeps for an alarm (c) senses how bright it is (d) turns a fan or wheels
  28. 28.What does a buzzer do? (a) makes a beeping sound (b) lets current go one way (c) senses how bright it is (d) smooths a wobbly supply
  29. 29.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) diode (d) buzzer
  30. 30.True or false: a thermistor blows if current is high. (a) False (b) True
  31. 31.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) thermistor (d) capacitor
  32. 32.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) diode (d) fuse
  33. 33.What does a fuse do? (a) senses how bright it is (b) makes things spin (c) blows if current is high (d) boosts a small signal
  34. 34.True or false: a diode lets current go one way. (a) True (b) False
  35. 35.True or false: a resistor limits the current. (a) True (b) False
  36. 36.What does a motor do? (a) is a resistance knob (b) makes things spin (c) makes a beeping sound (d) glows using little power
  37. 37.🧩 Which component senses how bright it is? (a) buzzer (b) transistor (c) LED (d) LDR
  38. 38.What does a diode do? (a) smooths a wobbly supply (b) makes things spin (c) lets current go one way (d) is a resistance knob
  39. 39.What does an LDR do? (a) limits the current (b) senses how bright it is (c) makes things spin (d) smooths a wobbly supply
  40. 40.True or false: a diode beeps for an alarm. (a) True (b) False

Answer key

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

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