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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 680 · 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) store charge briefly (c) measure heat (d) make light
  2. 2.What does a fuse do? (a) makes things spin (b) blows if current is high (c) makes a beeping sound (d) is a resistance knob
  3. 3.🧩 Which component blows if current is high? (a) transistor (b) potentiometer (c) capacitor (d) fuse
  4. 4.True or false: a fuse blows if current is high. (a) True (b) False
  5. 5.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) has coloured bands (d) stores a little charge
  6. 6.🧩 Which component is a resistance knob? (a) potentiometer (b) capacitor (c) fuse (d) LDR
  7. 7.🧩 Which component has coloured bands? (a) potentiometer (b) thermistor (c) LDR (d) resistor
  8. 8.🧩 Which component turns a fan or wheels? (a) fuse (b) diode (c) motor (d) LED
  9. 9.True or false: a diode turns a fan or wheels. (a) True (b) False
  10. 10.🧩 Which component senses how hot it is? (a) motor (b) thermistor (c) capacitor (d) diode
  11. 11.True or false: a potentiometer limits the current. (a) True (b) False
  12. 12.What does a resistor do? (a) senses how bright it is (b) turns a fan or wheels (c) glows using little power (d) has coloured bands
  13. 13.True or false: a transistor senses how bright it is. (a) True (b) False
  14. 14.What does a buzzer do? (a) turns a fan or wheels (b) makes a beeping sound (c) stores a little charge (d) senses how bright it is
  15. 15.What does a transistor do? (a) boosts a small signal (b) makes a beeping sound (c) is a resistance knob (d) limits the current
  16. 16.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) fuse (d) LDR
  17. 17.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
  18. 18.True or false: an LED blows if current is high. (a) True (b) False
  19. 19.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) thermistor (d) transistor
  20. 20.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  21. 21.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) motor (d) potentiometer
  22. 22.🧩 Which component makes things spin? (a) capacitor (b) motor (c) transistor (d) buzzer
  23. 23.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  24. 24.What does a capacitor do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how bright it is (d) has coloured bands
  25. 25.What does an LED do? (a) stores a little charge (b) senses how bright it is (c) senses how hot it is (d) glows using little power
  26. 26.True or false: a buzzer stores a little charge. (a) True (b) False
  27. 27.What does a motor do? (a) beeps for an alarm (b) turns a fan or wheels (c) limits the current (d) senses how hot it is
  28. 28.True or false: a buzzer boosts a small signal. (a) False (b) True
  29. 29.True or false: a thermistor boosts a small signal. (a) True (b) False
  30. 30.True or false: a diode smooths a wobbly supply. (a) False (b) True
  31. 31.True or false: a motor turns a fan or wheels. (a) True (b) False
  32. 32.🧩 Which component limits the current? (a) buzzer (b) transistor (c) capacitor (d) resistor
  33. 33.True or false: a diode lets current go one way. (a) True (b) False
  34. 34.True or false: a fuse stores a little charge. (a) False (b) True
  35. 35.🧩 Which component smooths a wobbly supply? (a) resistor (b) fuse (c) motor (d) capacitor
  36. 36.True or false: a potentiometer blows if current is high. (a) True (b) False
  37. 37.True or false: a transistor stores a little charge. (a) False (b) True
  38. 38.True or false: a capacitor stores a little charge. (a) True (b) False
  39. 39.What does a capacitor do? (a) beeps for an alarm (b) stores a little charge (c) senses how bright it is (d) makes a beeping sound
  40. 40.True or false: a potentiometer is a resistance knob. (a) False (b) True

Answer key

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

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