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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 346 · 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.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  2. 2.What does a potentiometer do? (a) limits the current (b) senses how hot it is (c) is a resistance knob (d) blows if current is high
  3. 3.True or false: a potentiometer stores a little charge. (a) True (b) False
  4. 4.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) resistor (d) LDR
  5. 5.What does a motor do? (a) senses how hot it is (b) makes a beeping sound (c) lets current go one way (d) turns a fan or wheels
  6. 6.True or false: a diode lets current go one way. (a) True (b) False
  7. 7.🧩 Which component limits the current? (a) transistor (b) LED (c) resistor (d) diode
  8. 8.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  9. 9.What does a capacitor do? (a) senses how hot it is (b) blows if current is high (c) beeps for an alarm (d) smooths a wobbly supply
  10. 10.True or false: an LED blows if current is high. (a) True (b) False
  11. 11.What does a fuse do? (a) lets current go one way (b) turns a fan or wheels (c) is a resistance knob (d) blows if current is high
  12. 12.What does a buzzer do? (a) senses how hot it is (b) glows using little power (c) blows if current is high (d) makes a beeping sound
  13. 13.True or false: a potentiometer blows if current is high. (a) False (b) True
  14. 14.What does a diode do? (a) lets current go one way (b) makes a beeping sound (c) senses how bright it is (d) turns a fan or wheels
  15. 15.What does an LDR do? (a) lets current go one way (b) blows if current is high (c) makes things spin (d) senses how bright it is
  16. 16.What does a buzzer do? (a) beeps for an alarm (b) stores a little charge (c) senses how bright it is (d) has coloured bands
  17. 17.True or false: a resistor lets current go one way. (a) False (b) True
  18. 18.🧩 Which component blows if current is high? (a) LDR (b) fuse (c) transistor (d) capacitor
  19. 19.True or false: a motor makes things spin. (a) False (b) True
  20. 20.True or false: a capacitor makes things spin. (a) False (b) True
  21. 21.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  22. 22.🧩 Which component glows using little power? (a) thermistor (b) LED (c) diode (d) capacitor
  23. 23.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  24. 24.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) potentiometer (d) resistor
  25. 25.🧩 Which component boosts a small signal? (a) motor (b) buzzer (c) transistor (d) resistor
  26. 26.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) potentiometer (d) LED
  27. 27.🧩 Which component has coloured bands? (a) fuse (b) capacitor (c) thermistor (d) resistor
  28. 28.🧩 Which component smooths a wobbly supply? (a) diode (b) motor (c) capacitor (d) potentiometer
  29. 29.True or false: a diode boosts a small signal. (a) True (b) False
  30. 30.True or false: a capacitor stores a little charge. (a) True (b) False
  31. 31.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  32. 32.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  33. 33.What does an LED do? (a) lets current go one way (b) boosts a small signal (c) glows using little power (d) has coloured bands
  34. 34.True or false: a motor turns a fan or wheels. (a) True (b) False
  35. 35.True or false: a diode blows if current is high. (a) False (b) True
  36. 36.🧩 Which component makes things spin? (a) LED (b) LDR (c) fuse (d) motor
  37. 37.What does a motor do? (a) blows if current is high (b) beeps for an alarm (c) stores a little charge (d) makes things spin
  38. 38.True or false: a resistor limits the current. (a) False (b) True
  39. 39.🧩 Which component turns a fan or wheels? (a) thermistor (b) fuse (c) transistor (d) motor
  40. 40.What does a capacitor do? (a) stores a little charge (b) beeps for an alarm (c) senses how bright it is (d) limits the current

Answer key

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

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