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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 642 · 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 part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  2. 2.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  3. 3.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) buzzer (d) transistor
  4. 4.🧩 Which component makes things spin? (a) diode (b) LED (c) fuse (d) motor
  5. 5.What does a fuse do? (a) blows if current is high (b) lets current go one way (c) smooths a wobbly supply (d) glows using little power
  6. 6.🧩 Which component limits the current? (a) motor (b) resistor (c) transistor (d) LDR
  7. 7.True or false: a buzzer makes things spin. (a) True (b) False
  8. 8.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  9. 9.True or false: a resistor makes a beeping sound. (a) True (b) False
  10. 10.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) LED (d) motor
  11. 11.True or false: a fuse blows if current is high. (a) False (b) True
  12. 12.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  13. 13.What does a thermistor do? (a) blows if current is high (b) lets current go one way (c) senses how hot it is (d) has coloured bands
  14. 14.What does a buzzer do? (a) beeps for an alarm (b) is a resistance knob (c) lets current go one way (d) stores a little charge
  15. 15.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) senses how hot it is (d) is a resistance knob
  16. 16.What does a buzzer do? (a) makes a beeping sound (b) senses how hot it is (c) makes things spin (d) is a resistance knob
  17. 17.What does a resistor do? (a) senses how bright it is (b) beeps for an alarm (c) makes things spin (d) limits the current
  18. 18.🧩 Which component glows using little power? (a) LED (b) capacitor (c) diode (d) motor
  19. 19.True or false: an LDR senses how bright it is. (a) False (b) True
  20. 20.🧩 Which component boosts a small signal? (a) buzzer (b) motor (c) fuse (d) transistor
  21. 21.True or false: an LDR boosts a small signal. (a) True (b) False
  22. 22.What does a capacitor do? (a) boosts a small signal (b) senses how hot it is (c) stores a little charge (d) has coloured bands
  23. 23.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) transistor (d) capacitor
  24. 24.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) limits the current (d) makes things spin
  25. 25.What does a motor do? (a) turns a fan or wheels (b) lets current go one way (c) is a resistance knob (d) smooths a wobbly supply
  26. 26.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) resistor (d) potentiometer
  27. 27.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) diode (c) fuse (d) capacitor
  28. 28.True or false: a potentiometer senses how hot it is. (a) False (b) True
  29. 29.True or false: a thermistor senses how hot it is. (a) True (b) False
  30. 30.True or false: a diode lets current go one way. (a) False (b) True
  31. 31.🧩 Which component senses how hot it is? (a) transistor (b) motor (c) thermistor (d) capacitor
  32. 32.True or false: a thermistor stores a little charge. (a) False (b) True
  33. 33.🧩 Which component blows if current is high? (a) LDR (b) motor (c) fuse (d) resistor
  34. 34.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  35. 35.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) potentiometer (d) capacitor
  36. 36.🧩 Which component turns a fan or wheels? (a) buzzer (b) LDR (c) motor (d) thermistor
  37. 37.What does an LDR do? (a) lets current go one way (b) senses how bright it is (c) blows if current is high (d) has coloured bands
  38. 38.🧩 Which component beeps for an alarm? (a) capacitor (b) resistor (c) transistor (d) buzzer
  39. 39.What does a capacitor do? (a) lets current go one way (b) smooths a wobbly supply (c) senses how bright it is (d) boosts a small signal
  40. 40.True or false: a resistor lets current go one way. (a) False (b) True

Answer key

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

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