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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 709 · 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 limits the current? (a) resistor (b) buzzer (c) thermistor (d) motor
  2. 2.What does a thermistor do? (a) blows if current is high (b) has coloured bands (c) senses how hot it is (d) limits the current
  3. 3.What does a potentiometer do? (a) makes things spin (b) limits the current (c) is a resistance knob (d) senses how bright it is
  4. 4.True or false: a potentiometer stores a little charge. (a) True (b) False
  5. 5.What does an LDR do? (a) blows if current is high (b) senses how hot it is (c) senses how bright it is (d) turns a fan or wheels
  6. 6.True or false: a resistor turns a fan or wheels. (a) False (b) True
  7. 7.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  8. 8.True or false: a capacitor stores a little charge. (a) True (b) False
  9. 9.What does a resistor do? (a) beeps for an alarm (b) lets current go one way (c) has coloured bands (d) makes a beeping sound
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  11. 11.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) buzzer (d) resistor
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  13. 13.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) senses how bright it is (d) limits the current
  14. 14.What does an LED do? (a) stores a little charge (b) makes a beeping sound (c) beeps for an alarm (d) glows using little power
  15. 15.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  16. 16.🧩 Which component boosts a small signal? (a) LED (b) capacitor (c) transistor (d) fuse
  17. 17.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) stores a little charge (d) lets current go one way
  18. 18.🧩 Which component smooths a wobbly supply? (a) motor (b) buzzer (c) thermistor (d) capacitor
  19. 19.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) senses how bright it is (d) glows using little power
  20. 20.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) lets current go one way (d) is a resistance knob
  21. 21.True or false: a diode has coloured bands. (a) True (b) False
  22. 22.🧩 Which component senses how hot it is? (a) motor (b) thermistor (c) capacitor (d) buzzer
  23. 23.What does a motor do? (a) lets current go one way (b) turns a fan or wheels (c) senses how hot it is (d) is a resistance knob
  24. 24.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  25. 25.True or false: a buzzer makes a beeping sound. (a) False (b) True
  26. 26.🧩 Which component makes a beeping sound? (a) resistor (b) potentiometer (c) diode (d) buzzer
  27. 27.🧩 Which component makes things spin? (a) resistor (b) thermistor (c) motor (d) transistor
  28. 28.🧩 Which component is a resistance knob? (a) diode (b) resistor (c) potentiometer (d) transistor
  29. 29.True or false: an LED glows using little power. (a) True (b) False
  30. 30.True or false: a capacitor makes a beeping sound. (a) True (b) False
  31. 31.What does a buzzer do? (a) blows if current is high (b) makes a beeping sound (c) senses how bright it is (d) has coloured bands
  32. 32.True or false: a transistor turns a fan or wheels. (a) True (b) False
  33. 33.🧩 Which component beeps for an alarm? (a) resistor (b) LDR (c) diode (d) buzzer
  34. 34.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) diode (d) LED
  35. 35.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) diode (d) capacitor
  36. 36.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) LDR (d) transistor
  37. 37.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  38. 38.True or false: a motor glows using little power. (a) False (b) True
  39. 39.🧩 Which component glows using little power? (a) motor (b) LED (c) buzzer (d) LDR
  40. 40.True or false: a capacitor senses how hot it is. (a) False (b) True

Answer key

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

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