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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 502 · 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.True or false: a resistor limits the current. (a) False (b) True
  2. 2.🧩 Which component boosts a small signal? (a) diode (b) thermistor (c) transistor (d) LED
  3. 3.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) makes things spin (d) makes a beeping sound
  4. 4.True or false: a motor limits the current. (a) True (b) False
  5. 5.🧩 Which component is a resistance knob? (a) thermistor (b) capacitor (c) potentiometer (d) diode
  6. 6.What does a capacitor do? (a) has coloured bands (b) smooths a wobbly supply (c) senses how hot it is (d) blows if current is high
  7. 7.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) potentiometer (d) capacitor
  8. 8.What does a resistor do? (a) is a resistance knob (b) boosts a small signal (c) has coloured bands (d) blows if current is high
  9. 9.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  11. 11.🧩 Which component makes a beeping sound? (a) resistor (b) diode (c) thermistor (d) buzzer
  12. 12.🧩 Which component limits the current? (a) diode (b) motor (c) LED (d) resistor
  13. 13.What does an LDR do? (a) lets current go one way (b) stores a little charge (c) senses how bright it is (d) beeps for an alarm
  14. 14.What does an LED do? (a) glows using little power (b) turns a fan or wheels (c) smooths a wobbly supply (d) stores a little charge
  15. 15.What does a resistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) glows using little power (d) limits the current
  16. 16.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) thermistor (d) buzzer
  17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  18. 18.🧩 Which component smooths a wobbly supply? (a) fuse (b) transistor (c) resistor (d) capacitor
  19. 19.🧩 Which component has coloured bands? (a) LED (b) resistor (c) diode (d) motor
  20. 20.🧩 Which component makes things spin? (a) LED (b) motor (c) fuse (d) buzzer
  21. 21.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) turns a fan or wheels (d) stores a little charge
  22. 22.True or false: a buzzer makes a beeping sound. (a) False (b) True
  23. 23.True or false: a resistor has coloured bands. (a) True (b) False
  24. 24.True or false: an LDR glows using little power. (a) True (b) False
  25. 25.True or false: a motor glows using little power. (a) True (b) False
  26. 26.True or false: a motor makes things spin. (a) True (b) False
  27. 27.True or false: a capacitor limits the current. (a) False (b) True
  28. 28.True or false: a motor turns a fan or wheels. (a) False (b) True
  29. 29.True or false: a diode senses how hot it is. (a) True (b) False
  30. 30.🧩 Which component stores a little charge? (a) potentiometer (b) resistor (c) LED (d) capacitor
  31. 31.🧩 Which component glows using little power? (a) transistor (b) potentiometer (c) resistor (d) LED
  32. 32.True or false: a potentiometer limits the current. (a) False (b) True
  33. 33.True or false: an LED glows using little power. (a) True (b) False
  34. 34.What does a diode do? (a) boosts a small signal (b) smooths a wobbly supply (c) lets current go one way (d) senses how hot it is
  35. 35.🧩 Which component blows if current is high? (a) buzzer (b) thermistor (c) fuse (d) LED
  36. 36.True or false: a motor makes a beeping sound. (a) True (b) False
  37. 37.True or false: a thermistor senses how hot it is. (a) True (b) False
  38. 38.What does a transistor do? (a) senses how hot it is (b) glows using little power (c) makes a beeping sound (d) boosts a small signal
  39. 39.What does a potentiometer do? (a) senses how bright it is (b) has coloured bands (c) is a resistance knob (d) turns a fan or wheels
  40. 40.🧩 Which component beeps for an alarm? (a) resistor (b) transistor (c) potentiometer (d) buzzer

Answer key

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

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