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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 625 · 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.True or false: a motor makes things spin. (a) True (b) False
  2. 2.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) potentiometer (d) thermistor
  3. 3.🧩 Which component boosts a small signal? (a) diode (b) thermistor (c) transistor (d) resistor
  4. 4.What does a transistor do? (a) senses how hot it is (b) stores a little charge (c) is a resistance knob (d) boosts a small signal
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  6. 6.🧩 Which component is a resistance knob? (a) transistor (b) fuse (c) potentiometer (d) resistor
  7. 7.🧩 Which component makes things spin? (a) motor (b) thermistor (c) buzzer (d) potentiometer
  8. 8.What does a motor do? (a) blows if current is high (b) boosts a small signal (c) turns a fan or wheels (d) smooths a wobbly supply
  9. 9.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  10. 10.True or false: a diode is a resistance knob. (a) False (b) True
  11. 11.True or false: a capacitor stores a little charge. (a) True (b) False
  12. 12.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) makes a beeping sound (d) glows using little power
  13. 13.True or false: an LED blows if current is high. (a) True (b) False
  14. 14.True or false: an LED lets current go one way. (a) True (b) False
  15. 15.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  16. 16.What does a resistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) makes things spin (d) has coloured bands
  17. 17.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) thermistor (d) capacitor
  18. 18.True or false: a buzzer blows if current is high. (a) True (b) False
  19. 19.🧩 Which component blows if current is high? (a) fuse (b) LED (c) transistor (d) potentiometer
  20. 20.What does an LED do? (a) boosts a small signal (b) is a resistance knob (c) beeps for an alarm (d) glows using little power
  21. 21.🧩 Which component glows using little power? (a) LED (b) LDR (c) thermistor (d) capacitor
  22. 22.True or false: a resistor senses how bright it is. (a) False (b) True
  23. 23.True or false: a fuse has coloured bands. (a) False (b) True
  24. 24.True or false: a transistor has coloured bands. (a) False (b) True
  25. 25.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) fuse (d) LED
  26. 26.🧩 Which component limits the current? (a) diode (b) resistor (c) thermistor (d) fuse
  27. 27.What does a diode do? (a) turns a fan or wheels (b) beeps for an alarm (c) glows using little power (d) lets current go one way
  28. 28.What does a buzzer do? (a) beeps for an alarm (b) senses how bright it is (c) lets current go one way (d) limits the current
  29. 29.What does a capacitor do? (a) stores a little charge (b) limits the current (c) has coloured bands (d) blows if current is high
  30. 30.🧩 Which component lets current go one way? (a) transistor (b) buzzer (c) LED (d) diode
  31. 31.🧩 Which component smooths a wobbly supply? (a) resistor (b) diode (c) capacitor (d) fuse
  32. 32.What does a motor do? (a) makes things spin (b) has coloured bands (c) smooths a wobbly supply (d) glows using little power
  33. 33.True or false: a motor beeps for an alarm. (a) False (b) True
  34. 34.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) buzzer (d) fuse
  35. 35.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  36. 36.🧩 Which component senses how bright it is? (a) transistor (b) fuse (c) diode (d) LDR
  37. 37.True or false: an LED limits the current. (a) True (b) False
  38. 38.What does a potentiometer do? (a) senses how hot it is (b) smooths a wobbly supply (c) is a resistance knob (d) limits the current
  39. 39.What does a thermistor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) senses how hot it is (d) makes things spin
  40. 40.True or false: a buzzer makes a beeping sound. (a) True (b) False

Answer key

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

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