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Electronics Worksheet: Electronic Components

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

Answer key

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

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