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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 116 · 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 capacitor stores a little charge. (a) False (b) True
  2. 2.What does a motor do? (a) smooths a wobbly supply (b) lets current go one way (c) turns a fan or wheels (d) beeps for an alarm
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  4. 4.What does a fuse do? (a) lets current go one way (b) boosts a small signal (c) turns a fan or wheels (d) blows if current is high
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  6. 6.What does a capacitor do? (a) makes things spin (b) makes a beeping sound (c) is a resistance knob (d) stores a little charge
  7. 7.What does a diode do? (a) senses how hot it is (b) stores a little charge (c) smooths a wobbly supply (d) lets current go one way
  8. 8.True or false: a resistor limits the current. (a) True (b) False
  9. 9.True or false: a transistor has coloured bands. (a) True (b) False
  10. 10.What does an LDR do? (a) beeps for an alarm (b) smooths a wobbly supply (c) lets current go one way (d) senses how bright it is
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  12. 12.What does a resistor do? (a) is a resistance knob (b) makes a beeping sound (c) has coloured bands (d) boosts a small signal
  13. 13.True or false: a thermistor senses how hot it is. (a) False (b) True
  14. 14.🧩 Which component blows if current is high? (a) thermistor (b) buzzer (c) fuse (d) potentiometer
  15. 15.What does an LED do? (a) beeps for an alarm (b) glows using little power (c) makes things spin (d) boosts a small signal
  16. 16.True or false: a diode lets current go one way. (a) True (b) False
  17. 17.True or false: a fuse limits the current. (a) False (b) True
  18. 18.True or false: a motor smooths a wobbly supply. (a) False (b) True
  19. 19.🧩 Which component senses how hot it is? (a) transistor (b) LDR (c) capacitor (d) thermistor
  20. 20.True or false: an LED makes a beeping sound. (a) True (b) False
  21. 21.What does a potentiometer do? (a) stores a little charge (b) smooths a wobbly supply (c) senses how hot it is (d) is a resistance knob
  22. 22.True or false: a buzzer beeps for an alarm. (a) False (b) True
  23. 23.True or false: an LED glows using little power. (a) True (b) False
  24. 24.True or false: a potentiometer glows using little power. (a) True (b) False
  25. 25.🧩 Which component glows using little power? (a) diode (b) resistor (c) LED (d) LDR
  26. 26.🧩 Which component stores a little charge? (a) potentiometer (b) thermistor (c) motor (d) capacitor
  27. 27.What does a buzzer do? (a) is a resistance knob (b) makes a beeping sound (c) boosts a small signal (d) smooths a wobbly supply
  28. 28.True or false: a buzzer lets current go one way. (a) True (b) False
  29. 29.True or false: a transistor limits the current. (a) True (b) False
  30. 30.What does a motor do? (a) glows using little power (b) senses how bright it is (c) makes things spin (d) lets current go one way
  31. 31.🧩 Which component smooths a wobbly supply? (a) thermistor (b) diode (c) fuse (d) capacitor
  32. 32.🧩 Which component is a resistance knob? (a) motor (b) transistor (c) potentiometer (d) fuse
  33. 33.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) motor (d) fuse
  34. 34.🧩 Which component senses how bright it is? (a) LDR (b) fuse (c) buzzer (d) resistor
  35. 35.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) motor (d) LED
  36. 36.🧩 Which component turns a fan or wheels? (a) motor (b) LED (c) fuse (d) resistor
  37. 37.True or false: a fuse stores a little charge. (a) False (b) True
  38. 38.True or false: a thermistor stores a little charge. (a) True (b) False
  39. 39.What does a resistor do? (a) makes things spin (b) limits the current (c) blows if current is high (d) stores a little charge
  40. 40.🧩 Which component boosts a small signal? (a) motor (b) diode (c) transistor (d) potentiometer

Answer key

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

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