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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 361 · 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) thermistor (b) capacitor (c) motor (d) fuse
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  3. 3.🧩 Which component limits the current? (a) buzzer (b) thermistor (c) LED (d) resistor
  4. 4.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) boosts a small signal (d) senses how bright it is
  5. 5.True or false: a potentiometer is a resistance knob. (a) False (b) True
  6. 6.What does a buzzer do? (a) makes a beeping sound (b) blows if current is high (c) stores a little charge (d) is a resistance knob
  7. 7.True or false: a buzzer boosts a small signal. (a) True (b) False
  8. 8.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  9. 9.🧩 Which component makes things spin? (a) transistor (b) motor (c) LED (d) thermistor
  10. 10.True or false: a motor turns a fan or wheels. (a) True (b) False
  11. 11.True or false: a thermistor boosts a small signal. (a) True (b) False
  12. 12.🧩 Which component lets current go one way? (a) resistor (b) LED (c) capacitor (d) diode
  13. 13.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  14. 14.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) fuse (d) resistor
  15. 15.🧩 Which component has coloured bands? (a) thermistor (b) diode (c) potentiometer (d) resistor
  16. 16.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  17. 17.What does a diode do? (a) has coloured bands (b) limits the current (c) lets current go one way (d) boosts a small signal
  18. 18.True or false: a resistor blows if current is high. (a) False (b) True
  19. 19.🧩 Which component boosts a small signal? (a) capacitor (b) buzzer (c) transistor (d) motor
  20. 20.🧩 Which component senses how bright it is? (a) LDR (b) diode (c) LED (d) thermistor
  21. 21.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) turns a fan or wheels (d) is a resistance knob
  22. 22.True or false: a buzzer makes a beeping sound. (a) False (b) True
  23. 23.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) thermistor (d) potentiometer
  24. 24.True or false: a diode lets current go one way. (a) True (b) False
  25. 25.True or false: a motor makes things spin. (a) False (b) True
  26. 26.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) buzzer (d) transistor
  27. 27.What does a buzzer do? (a) lets current go one way (b) stores a little charge (c) has coloured bands (d) beeps for an alarm
  28. 28.True or false: a buzzer senses how hot it is. (a) True (b) False
  29. 29.What does a thermistor do? (a) has coloured bands (b) is a resistance knob (c) senses how hot it is (d) glows using little power
  30. 30.What does a resistor do? (a) senses how bright it is (b) senses how hot it is (c) has coloured bands (d) is a resistance knob
  31. 31.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) thermistor (d) fuse
  32. 32.True or false: a fuse blows if current is high. (a) True (b) False
  33. 33.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) thermistor (d) buzzer
  34. 34.True or false: a potentiometer limits the current. (a) False (b) True
  35. 35.What does an LED do? (a) glows using little power (b) limits the current (c) turns a fan or wheels (d) boosts a small signal
  36. 36.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) smooths a wobbly supply (d) makes a beeping sound
  37. 37.What does a resistor do? (a) limits the current (b) senses how bright it is (c) glows using little power (d) smooths a wobbly supply
  38. 38.🧩 Which component is a resistance knob? (a) LDR (b) capacitor (c) potentiometer (d) thermistor
  39. 39.True or false: an LED limits the current. (a) True (b) False
  40. 40.True or false: a buzzer is a resistance knob. (a) True (b) False

Answer key

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

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