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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 76 · 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 motor (b) a fuse (c) an LED (d) a resistor
  2. 2.🧩 Which component stores a little charge? (a) resistor (b) capacitor (c) motor (d) transistor
  3. 3.True or false: an LDR makes things spin. (a) False (b) True
  4. 4.What does an LED do? (a) smooths a wobbly supply (b) glows using little power (c) senses how bright it is (d) makes a beeping sound
  5. 5.What does a thermistor do? (a) senses how hot it is (b) senses how bright it is (c) limits the current (d) turns a fan or wheels
  6. 6.True or false: an LDR senses how bright it is. (a) False (b) True
  7. 7.True or false: a capacitor boosts a small signal. (a) False (b) True
  8. 8.True or false: a buzzer beeps for an alarm. (a) True (b) False
  9. 9.🧩 Which component has coloured bands? (a) diode (b) capacitor (c) resistor (d) LDR
  10. 10.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  11. 11.What does a transistor do? (a) stores a little charge (b) senses how bright it is (c) boosts a small signal (d) lets current go one way
  12. 12.What does a fuse do? (a) is a resistance knob (b) blows if current is high (c) makes things spin (d) limits the current
  13. 13.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  14. 14.🧩 Which component lets current go one way? (a) motor (b) diode (c) fuse (d) capacitor
  15. 15.True or false: a resistor limits the current. (a) False (b) True
  16. 16.What does a resistor do? (a) turns a fan or wheels (b) has coloured bands (c) makes a beeping sound (d) senses how hot it is
  17. 17.True or false: a diode makes things spin. (a) False (b) True
  18. 18.🧩 Which component limits the current? (a) buzzer (b) capacitor (c) thermistor (d) resistor
  19. 19.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) is a resistance knob (d) turns a fan or wheels
  20. 20.True or false: a thermistor senses how hot it is. (a) False (b) True
  21. 21.What does a motor do? (a) limits the current (b) senses how bright it is (c) is a resistance knob (d) turns a fan or wheels
  22. 22.🧩 Which component glows using little power? (a) thermistor (b) LED (c) diode (d) motor
  23. 23.True or false: a capacitor stores a little charge. (a) False (b) True
  24. 24.True or false: an LED senses how bright it is. (a) True (b) False
  25. 25.True or false: a capacitor limits the current. (a) True (b) False
  26. 26.🧩 Which component senses how hot it is? (a) thermistor (b) LED (c) capacitor (d) potentiometer
  27. 27.True or false: a resistor turns a fan or wheels. (a) True (b) False
  28. 28.🧩 Which component blows if current is high? (a) motor (b) LDR (c) fuse (d) potentiometer
  29. 29.True or false: a buzzer makes a beeping sound. (a) False (b) True
  30. 30.What does a motor do? (a) makes things spin (b) makes a beeping sound (c) stores a little charge (d) has coloured bands
  31. 31.True or false: a diode smooths a wobbly supply. (a) True (b) False
  32. 32.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  33. 33.True or false: a buzzer stores a little charge. (a) False (b) True
  34. 34.🧩 Which component makes things spin? (a) motor (b) transistor (c) resistor (d) LED
  35. 35.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) beeps for an alarm (d) is a resistance knob
  36. 36.🧩 Which component is a resistance knob? (a) capacitor (b) diode (c) potentiometer (d) LED
  37. 37.True or false: a potentiometer is a resistance knob. (a) False (b) True
  38. 38.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) buzzer (d) potentiometer
  39. 39.True or false: an LED beeps for an alarm. (a) True (b) False
  40. 40.True or false: an LDR has coloured bands. (a) False (b) True

Answer key

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

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