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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 636 · 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 turns a fan or wheels. (a) True (b) False
  2. 2.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) transistor (d) resistor
  3. 3.🧩 Which component senses how bright it is? (a) capacitor (b) motor (c) buzzer (d) LDR
  4. 4.🧩 Which component stores a little charge? (a) buzzer (b) thermistor (c) capacitor (d) resistor
  5. 5.What does an LDR do? (a) limits the current (b) stores a little charge (c) senses how hot it is (d) senses how bright it is
  6. 6.🧩 Which component senses how hot it is? (a) thermistor (b) potentiometer (c) resistor (d) fuse
  7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  8. 8.🧩 Which component blows if current is high? (a) transistor (b) fuse (c) capacitor (d) diode
  9. 9.What does a thermistor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) senses how hot it is (d) turns a fan or wheels
  10. 10.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) motor (d) capacitor
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
  12. 12.What does a buzzer do? (a) stores a little charge (b) glows using little power (c) makes a beeping sound (d) senses how hot it is
  13. 13.🧩 Which component boosts a small signal? (a) diode (b) transistor (c) fuse (d) capacitor
  14. 14.What does a motor do? (a) stores a little charge (b) limits the current (c) makes a beeping sound (d) turns a fan or wheels
  15. 15.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) diode (d) fuse
  16. 16.True or false: a motor makes things spin. (a) False (b) True
  17. 17.🧩 Which component lets current go one way? (a) diode (b) fuse (c) buzzer (d) motor
  18. 18.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  19. 19.What does a capacitor do? (a) senses how bright it is (b) turns a fan or wheels (c) stores a little charge (d) makes things spin
  20. 20.True or false: an LDR stores a little charge. (a) False (b) True
  21. 21.True or false: a capacitor senses how bright it is. (a) False (b) True
  22. 22.What does a resistor do? (a) smooths a wobbly supply (b) glows using little power (c) limits the current (d) stores a little charge
  23. 23.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) LDR (d) diode
  24. 24.True or false: a motor stores a little charge. (a) True (b) False
  25. 25.True or false: a diode beeps for an alarm. (a) True (b) False
  26. 26.🧩 Which component limits the current? (a) transistor (b) LDR (c) resistor (d) LED
  27. 27.True or false: a fuse beeps for an alarm. (a) False (b) True
  28. 28.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) transistor (d) diode
  29. 29.🧩 Which component is a resistance knob? (a) potentiometer (b) fuse (c) buzzer (d) capacitor
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  31. 31.What does a transistor do? (a) boosts a small signal (b) makes a beeping sound (c) is a resistance knob (d) lets current go one way
  32. 32.True or false: a resistor has coloured bands. (a) False (b) True
  33. 33.True or false: a thermistor senses how hot it is. (a) True (b) False
  34. 34.🧩 Which component makes things spin? (a) fuse (b) LDR (c) thermistor (d) motor
  35. 35.True or false: a diode makes things spin. (a) False (b) True
  36. 36.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) limits the current (d) has coloured bands
  37. 37.What does a capacitor do? (a) glows using little power (b) makes a beeping sound (c) has coloured bands (d) smooths a wobbly supply
  38. 38.What does a potentiometer do? (a) beeps for an alarm (b) senses how bright it is (c) stores a little charge (d) is a resistance knob
  39. 39.True or false: a resistor stores a little charge. (a) False (b) True
  40. 40.True or false: a fuse blows if current is high. (a) False (b) True

Answer key

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

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