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Electronics Worksheet: Electronic Components

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

Answer key

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

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