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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 629 · 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 transistor boosts a small signal. (a) True (b) False
  2. 2.What does an LED do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) glows using little power
  3. 3.What does a potentiometer do? (a) lets current go one way (b) stores a little charge (c) makes things spin (d) is a resistance knob
  4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  5. 5.🧩 Which component turns a fan or wheels? (a) diode (b) thermistor (c) motor (d) fuse
  6. 6.🧩 Which component boosts a small signal? (a) LED (b) fuse (c) transistor (d) diode
  7. 7.🧩 Which component limits the current? (a) potentiometer (b) capacitor (c) fuse (d) resistor
  8. 8.What does a thermistor do? (a) makes things spin (b) beeps for an alarm (c) senses how hot it is (d) boosts a small signal
  9. 9.🧩 Which component beeps for an alarm? (a) thermistor (b) buzzer (c) LDR (d) transistor
  10. 10.True or false: a fuse has coloured bands. (a) True (b) False
  11. 11.True or false: a resistor lets current go one way. (a) True (b) False
  12. 12.What does a motor do? (a) turns a fan or wheels (b) boosts a small signal (c) senses how bright it is (d) is a resistance knob
  13. 13.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  14. 14.True or false: a buzzer blows if current is high. (a) True (b) False
  15. 15.True or false: a fuse boosts a small signal. (a) True (b) False
  16. 16.True or false: a potentiometer is a resistance knob. (a) True (b) False
  17. 17.What does an LDR do? (a) is a resistance knob (b) has coloured bands (c) senses how bright it is (d) blows if current is high
  18. 18.True or false: a motor turns a fan or wheels. (a) True (b) False
  19. 19.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  20. 20.🧩 Which component glows using little power? (a) motor (b) LED (c) fuse (d) thermistor
  21. 21.🧩 Which component is a resistance knob? (a) transistor (b) resistor (c) potentiometer (d) diode
  22. 22.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  23. 23.What does a capacitor do? (a) has coloured bands (b) senses how bright it is (c) stores a little charge (d) makes things spin
  24. 24.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  25. 25.True or false: a capacitor glows using little power. (a) True (b) False
  26. 26.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) potentiometer (d) LED
  27. 27.What does a capacitor do? (a) boosts a small signal (b) smooths a wobbly supply (c) has coloured bands (d) beeps for an alarm
  28. 28.True or false: a thermistor senses how hot it is. (a) True (b) False
  29. 29.True or false: a transistor has coloured bands. (a) True (b) False
  30. 30.What does a buzzer do? (a) stores a little charge (b) glows using little power (c) has coloured bands (d) beeps for an alarm
  31. 31.What does a resistor do? (a) makes a beeping sound (b) lets current go one way (c) limits the current (d) glows using little power
  32. 32.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) smooths a wobbly supply (d) makes a beeping sound
  33. 33.True or false: an LED glows using little power. (a) True (b) False
  34. 34.True or false: a resistor limits the current. (a) False (b) True
  35. 35.True or false: an LDR senses how bright it is. (a) False (b) True
  36. 36.🧩 Which component lets current go one way? (a) LED (b) transistor (c) buzzer (d) diode
  37. 37.What does a fuse do? (a) lets current go one way (b) boosts a small signal (c) blows if current is high (d) has coloured bands
  38. 38.True or false: an LDR makes things spin. (a) True (b) False
  39. 39.🧩 Which component makes a beeping sound? (a) LED (b) fuse (c) diode (d) buzzer
  40. 40.🧩 Which component smooths a wobbly supply? (a) thermistor (b) diode (c) potentiometer (d) capacitor

Answer key

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

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