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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 58 · 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.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  2. 2.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  3. 3.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) senses how hot it is (d) beeps for an alarm
  4. 4.What does a motor do? (a) blows if current is high (b) makes things spin (c) glows using little power (d) lets current go one way
  5. 5.True or false: a buzzer boosts a small signal. (a) False (b) True
  6. 6.What does an LDR do? (a) senses how bright it is (b) limits the current (c) makes a beeping sound (d) stores a little charge
  7. 7.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) resistor (d) thermistor
  8. 8.What does a capacitor do? (a) smooths a wobbly supply (b) has coloured bands (c) makes a beeping sound (d) lets current go one way
  9. 9.True or false: an LDR has coloured bands. (a) False (b) True
  10. 10.True or false: a capacitor is a resistance knob. (a) True (b) False
  11. 11.True or false: a buzzer limits the current. (a) True (b) False
  12. 12.True or false: a buzzer has coloured bands. (a) True (b) False
  13. 13.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) thermistor (d) resistor
  14. 14.🧩 Which component blows if current is high? (a) LED (b) capacitor (c) fuse (d) potentiometer
  15. 15.🧩 Which component limits the current? (a) LDR (b) LED (c) resistor (d) potentiometer
  16. 16.🧩 Which component stores a little charge? (a) LED (b) transistor (c) resistor (d) capacitor
  17. 17.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) makes things spin (d) stores a little charge
  18. 18.🧩 Which component makes a beeping sound? (a) buzzer (b) LDR (c) fuse (d) potentiometer
  19. 19.True or false: an LED glows using little power. (a) True (b) False
  20. 20.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  21. 21.True or false: a motor has coloured bands. (a) True (b) False
  22. 22.True or false: an LDR beeps for an alarm. (a) True (b) False
  23. 23.🧩 Which component has coloured bands? (a) motor (b) buzzer (c) resistor (d) diode
  24. 24.🧩 Which component glows using little power? (a) motor (b) LED (c) LDR (d) resistor
  25. 25.What does an LED do? (a) is a resistance knob (b) stores a little charge (c) limits the current (d) glows using little power
  26. 26.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  27. 27.True or false: a buzzer makes a beeping sound. (a) False (b) True
  28. 28.What does a thermistor do? (a) turns a fan or wheels (b) makes a beeping sound (c) makes things spin (d) senses how hot it is
  29. 29.What does a resistor do? (a) glows using little power (b) makes a beeping sound (c) has coloured bands (d) lets current go one way
  30. 30.🧩 Which component is a resistance knob? (a) diode (b) buzzer (c) resistor (d) potentiometer
  31. 31.True or false: a potentiometer makes things spin. (a) False (b) True
  32. 32.True or false: a thermistor blows if current is high. (a) True (b) False
  33. 33.True or false: a diode lets current go one way. (a) True (b) False
  34. 34.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) glows using little power (d) makes a beeping sound
  35. 35.True or false: a buzzer beeps for an alarm. (a) True (b) False
  36. 36.🧩 Which component lets current go one way? (a) diode (b) resistor (c) potentiometer (d) motor
  37. 37.🧩 Which component makes things spin? (a) motor (b) transistor (c) fuse (d) thermistor
  38. 38.🧩 Which component smooths a wobbly supply? (a) LED (b) potentiometer (c) LDR (d) capacitor
  39. 39.🧩 Which component senses how bright it is? (a) buzzer (b) motor (c) resistor (d) LDR
  40. 40.True or false: a motor senses how hot it is. (a) False (b) True

Answer key

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

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