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Electronics Worksheet: Electronic Components

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

Answer key

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

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