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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 164 · 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.True or false: an LED senses how hot it is. (a) True (b) False
  3. 3.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) transistor (d) capacitor
  4. 4.True or false: a resistor lets current go one way. (a) True (b) False
  5. 5.What does a resistor do? (a) is a resistance knob (b) makes a beeping sound (c) turns a fan or wheels (d) has coloured bands
  6. 6.🧩 Which component senses how bright it is? (a) LDR (b) resistor (c) diode (d) potentiometer
  7. 7.🧩 Which component turns a fan or wheels? (a) LDR (b) potentiometer (c) motor (d) resistor
  8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  9. 9.🧩 Which component makes things spin? (a) LED (b) thermistor (c) transistor (d) motor
  10. 10.True or false: a motor boosts a small signal. (a) True (b) False
  11. 11.🧩 Which component glows using little power? (a) buzzer (b) LED (c) resistor (d) transistor
  12. 12.What does an LED do? (a) senses how bright it is (b) glows using little power (c) boosts a small signal (d) limits the current
  13. 13.What does a buzzer do? (a) blows if current is high (b) senses how bright it is (c) beeps for an alarm (d) lets current go one way
  14. 14.True or false: a capacitor blows if current is high. (a) True (b) False
  15. 15.What does a potentiometer do? (a) has coloured bands (b) limits the current (c) smooths a wobbly supply (d) is a resistance knob
  16. 16.What does a motor do? (a) turns a fan or wheels (b) boosts a small signal (c) makes a beeping sound (d) has coloured bands
  17. 17.🧩 Which component makes a beeping sound? (a) LED (b) potentiometer (c) diode (d) buzzer
  18. 18.What does a capacitor do? (a) makes a beeping sound (b) glows using little power (c) stores a little charge (d) blows if current is high
  19. 19.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  20. 20.What does a thermistor do? (a) stores a little charge (b) beeps for an alarm (c) makes a beeping sound (d) senses how hot it is
  21. 21.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) turns a fan or wheels (d) beeps for an alarm
  22. 22.True or false: a fuse senses how hot it is. (a) True (b) False
  23. 23.True or false: a motor has coloured bands. (a) True (b) False
  24. 24.True or false: an LDR makes things spin. (a) False (b) True
  25. 25.True or false: a capacitor stores a little charge. (a) False (b) True
  26. 26.True or false: a fuse blows if current is high. (a) True (b) False
  27. 27.🧩 Which component boosts a small signal? (a) thermistor (b) transistor (c) motor (d) LED
  28. 28.True or false: an LDR boosts a small signal. (a) True (b) False
  29. 29.True or false: a thermistor has coloured bands. (a) False (b) True
  30. 30.What does a motor do? (a) lets current go one way (b) has coloured bands (c) senses how hot it is (d) makes things spin
  31. 31.🧩 Which component smooths a wobbly supply? (a) motor (b) LED (c) capacitor (d) LDR
  32. 32.True or false: a resistor glows using little power. (a) True (b) False
  33. 33.True or false: a transistor lets current go one way. (a) False (b) True
  34. 34.🧩 Which component blows if current is high? (a) thermistor (b) transistor (c) fuse (d) buzzer
  35. 35.True or false: a diode lets current go one way. (a) False (b) True
  36. 36.What does a capacitor do? (a) lets current go one way (b) makes a beeping sound (c) turns a fan or wheels (d) smooths a wobbly supply
  37. 37.True or false: a motor makes things spin. (a) False (b) True
  38. 38.True or false: a resistor has coloured bands. (a) False (b) True
  39. 39.🧩 Which component limits the current? (a) resistor (b) diode (c) LDR (d) LED
  40. 40.True or false: a thermistor blows if current is high. (a) True (b) False

Answer key

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

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