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Electronics Worksheet: Electronic Components

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

Answer key

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

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