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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 615 · 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.What does a buzzer do? (a) makes a beeping sound (b) senses how hot it is (c) lets current go one way (d) boosts a small signal
  2. 2.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  3. 3.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  4. 4.True or false: a motor beeps for an alarm. (a) True (b) False
  5. 5.True or false: a transistor glows using little power. (a) True (b) False
  6. 6.True or false: a motor senses how hot it is. (a) True (b) False
  7. 7.🧩 Which component smooths a wobbly supply? (a) LDR (b) thermistor (c) transistor (d) capacitor
  8. 8.🧩 Which component makes things spin? (a) diode (b) resistor (c) capacitor (d) motor
  9. 9.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) transistor (d) capacitor
  10. 10.What does a fuse do? (a) smooths a wobbly supply (b) stores a little charge (c) beeps for an alarm (d) blows if current is high
  11. 11.True or false: an LED lets current go one way. (a) True (b) False
  12. 12.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  13. 13.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) diode (d) LED
  14. 14.🧩 Which component is a resistance knob? (a) potentiometer (b) diode (c) LDR (d) motor
  15. 15.True or false: a buzzer stores a little charge. (a) True (b) False
  16. 16.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) diode (d) transistor
  17. 17.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) is a resistance knob (d) smooths a wobbly supply
  18. 18.True or false: a diode lets current go one way. (a) False (b) True
  19. 19.What does a capacitor do? (a) makes things spin (b) beeps for an alarm (c) smooths a wobbly supply (d) glows using little power
  20. 20.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) capacitor (d) motor
  21. 21.What does a resistor do? (a) makes a beeping sound (b) lets current go one way (c) limits the current (d) stores a little charge
  22. 22.True or false: an LED is a resistance knob. (a) False (b) True
  23. 23.True or false: an LDR senses how bright it is. (a) False (b) True
  24. 24.What does a diode do? (a) limits the current (b) lets current go one way (c) beeps for an alarm (d) smooths a wobbly supply
  25. 25.🧩 Which component limits the current? (a) motor (b) resistor (c) LDR (d) fuse
  26. 26.🧩 Which component blows if current is high? (a) LDR (b) fuse (c) resistor (d) LED
  27. 27.True or false: a transistor boosts a small signal. (a) True (b) False
  28. 28.True or false: an LED boosts a small signal. (a) True (b) False
  29. 29.🧩 Which component glows using little power? (a) LED (b) resistor (c) capacitor (d) buzzer
  30. 30.True or false: a capacitor has coloured bands. (a) True (b) False
  31. 31.True or false: a motor boosts a small signal. (a) False (b) True
  32. 32.True or false: a capacitor stores a little charge. (a) False (b) True
  33. 33.True or false: a fuse blows if current is high. (a) True (b) False
  34. 34.True or false: a thermistor senses how hot it is. (a) True (b) False
  35. 35.True or false: a motor turns a fan or wheels. (a) True (b) False
  36. 36.What does a thermistor do? (a) stores a little charge (b) beeps for an alarm (c) has coloured bands (d) senses how hot it is
  37. 37.What does an LDR do? (a) senses how bright it is (b) makes a beeping sound (c) limits the current (d) smooths a wobbly supply
  38. 38.What does an LED do? (a) turns a fan or wheels (b) beeps for an alarm (c) glows using little power (d) blows if current is high
  39. 39.True or false: a fuse senses how bright it is. (a) True (b) False
  40. 40.What does a potentiometer do? (a) beeps for an alarm (b) is a resistance knob (c) turns a fan or wheels (d) boosts a small signal

Answer key

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

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