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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 689 · 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) thermistor (b) capacitor (c) resistor (d) LED
  2. 2.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) lets current go one way (d) stores a little charge
  3. 3.What does a capacitor do? (a) makes things spin (b) limits the current (c) smooths a wobbly supply (d) makes a beeping sound
  4. 4.🧩 Which component senses how hot it is? (a) resistor (b) diode (c) thermistor (d) buzzer
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  6. 6.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  7. 7.True or false: a buzzer stores a little charge. (a) True (b) False
  8. 8.True or false: an LDR senses how bright it is. (a) False (b) True
  9. 9.What does a motor do? (a) turns a fan or wheels (b) makes a beeping sound (c) beeps for an alarm (d) stores a little charge
  10. 10.True or false: a buzzer is a resistance knob. (a) True (b) False
  11. 11.True or false: a fuse is a resistance knob. (a) True (b) False
  12. 12.🧩 Which component beeps for an alarm? (a) resistor (b) transistor (c) buzzer (d) thermistor
  13. 13.True or false: a buzzer beeps for an alarm. (a) False (b) True
  14. 14.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  15. 15.What does a thermistor do? (a) senses how hot it is (b) glows using little power (c) has coloured bands (d) boosts a small signal
  16. 16.True or false: a thermistor has coloured bands. (a) True (b) False
  17. 17.What does a buzzer do? (a) makes a beeping sound (b) limits the current (c) smooths a wobbly supply (d) lets current go one way
  18. 18.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  19. 19.True or false: a transistor glows using little power. (a) True (b) False
  20. 20.🧩 Which component is a resistance knob? (a) buzzer (b) LED (c) potentiometer (d) motor
  21. 21.What does a motor do? (a) is a resistance knob (b) makes a beeping sound (c) smooths a wobbly supply (d) makes things spin
  22. 22.True or false: a thermistor senses how hot it is. (a) False (b) True
  23. 23.True or false: a capacitor stores a little charge. (a) True (b) False
  24. 24.What does an LDR do? (a) senses how bright it is (b) is a resistance knob (c) limits the current (d) glows using little power
  25. 25.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) senses how bright it is (d) lets current go one way
  26. 26.True or false: a buzzer has coloured bands. (a) False (b) True
  27. 27.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  28. 28.True or false: a fuse blows if current is high. (a) True (b) False
  29. 29.True or false: an LED makes a beeping sound. (a) True (b) False
  30. 30.What does a transistor do? (a) senses how hot it is (b) boosts a small signal (c) is a resistance knob (d) beeps for an alarm
  31. 31.🧩 Which component senses how bright it is? (a) LDR (b) transistor (c) resistor (d) buzzer
  32. 32.What does a resistor do? (a) turns a fan or wheels (b) limits the current (c) glows using little power (d) beeps for an alarm
  33. 33.True or false: a resistor makes a beeping sound. (a) True (b) False
  34. 34.🧩 Which component lets current go one way? (a) transistor (b) fuse (c) diode (d) buzzer
  35. 35.True or false: a resistor makes things spin. (a) False (b) True
  36. 36.What does a diode do? (a) senses how hot it is (b) turns a fan or wheels (c) makes a beeping sound (d) lets current go one way
  37. 37.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) resistor (d) fuse
  38. 38.True or false: a motor makes things spin. (a) False (b) True
  39. 39.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) capacitor (d) LED
  40. 40.What does a fuse do? (a) blows if current is high (b) limits the current (c) stores a little charge (d) senses how bright it is

Answer key

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

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