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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 657 · 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 beeps for an alarm? (a) capacitor (b) diode (c) buzzer (d) resistor
  2. 2.True or false: a resistor senses how bright it is. (a) True (b) False
  3. 3.🧩 Which component makes things spin? (a) thermistor (b) LED (c) motor (d) capacitor
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  5. 5.True or false: an LED stores a little charge. (a) True (b) False
  6. 6.What does a fuse do? (a) makes things spin (b) lets current go one way (c) stores a little charge (d) blows if current is high
  7. 7.True or false: a resistor limits the current. (a) True (b) False
  8. 8.True or false: an LDR lets current go one way. (a) False (b) True
  9. 9.🧩 Which component stores a little charge? (a) diode (b) LED (c) capacitor (d) resistor
  10. 10.🧩 Which component is a resistance knob? (a) fuse (b) buzzer (c) resistor (d) potentiometer
  11. 11.What does a buzzer do? (a) glows using little power (b) turns a fan or wheels (c) is a resistance knob (d) beeps for an alarm
  12. 12.🧩 Which component turns a fan or wheels? (a) capacitor (b) resistor (c) motor (d) potentiometer
  13. 13.True or false: a transistor boosts a small signal. (a) True (b) False
  14. 14.🧩 Which component senses how hot it is? (a) fuse (b) motor (c) capacitor (d) thermistor
  15. 15.What does a potentiometer do? (a) senses how bright it is (b) limits the current (c) lets current go one way (d) is a resistance knob
  16. 16.True or false: a diode makes things spin. (a) True (b) False
  17. 17.🧩 Which component lets current go one way? (a) capacitor (b) buzzer (c) diode (d) resistor
  18. 18.True or false: a resistor has coloured bands. (a) False (b) True
  19. 19.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  20. 20.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) diode (d) motor
  21. 21.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  22. 22.True or false: a thermistor senses how hot it is. (a) False (b) True
  23. 23.What does a capacitor do? (a) limits the current (b) lets current go one way (c) stores a little charge (d) boosts a small signal
  24. 24.🧩 Which component blows if current is high? (a) LED (b) resistor (c) diode (d) fuse
  25. 25.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  26. 26.True or false: a potentiometer limits the current. (a) True (b) False
  27. 27.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) resistor (d) potentiometer
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  29. 29.True or false: a capacitor stores a little charge. (a) False (b) True
  30. 30.What does an LDR do? (a) makes a beeping sound (b) limits the current (c) is a resistance knob (d) senses how bright it is
  31. 31.What does a buzzer do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) makes a beeping sound (d) senses how bright it is
  32. 32.🧩 Which component glows using little power? (a) transistor (b) thermistor (c) LED (d) buzzer
  33. 33.True or false: a buzzer beeps for an alarm. (a) True (b) False
  34. 34.True or false: a resistor boosts a small signal. (a) False (b) True
  35. 35.True or false: an LDR boosts a small signal. (a) True (b) False
  36. 36.True or false: a capacitor makes a beeping sound. (a) False (b) True
  37. 37.True or false: an LED limits the current. (a) True (b) False
  38. 38.What does a motor do? (a) blows if current is high (b) makes things spin (c) stores a little charge (d) glows using little power
  39. 39.🧩 Which component makes a beeping sound? (a) potentiometer (b) fuse (c) LDR (d) buzzer
  40. 40.True or false: a diode lets current go one way. (a) True (b) False

Answer key

  1. buzzer
  2. False
  3. motor
  4. a buzzer
  5. False
  6. blows if current is high
  7. True
  8. False
  9. capacitor
  10. potentiometer
  11. beeps for an alarm
  12. motor
  13. True
  14. thermistor
  15. is a resistance knob
  16. False
  17. diode
  18. True
  19. store charge briefly
  20. capacitor
  21. a motor
  22. True
  23. stores a little charge
  24. fuse
  25. False
  26. False
  27. LDR
  28. True
  29. True
  30. senses how bright it is
  31. makes a beeping sound
  32. LED
  33. True
  34. False
  35. False
  36. False
  37. False
  38. makes things spin
  39. buzzer
  40. True

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