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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 119 · 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.What does a capacitor do? (a) smooths a wobbly supply (b) senses how bright it is (c) blows if current is high (d) boosts a small signal
  2. 2.True or false: a capacitor stores a little charge. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  4. 4.🧩 Which component limits the current? (a) resistor (b) motor (c) LED (d) fuse
  5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  6. 6.🧩 Which component has coloured bands? (a) diode (b) capacitor (c) fuse (d) resistor
  7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  8. 8.🧩 Which component senses how bright it is? (a) potentiometer (b) fuse (c) LDR (d) transistor
  9. 9.🧩 Which component makes things spin? (a) motor (b) thermistor (c) LED (d) LDR
  10. 10.True or false: an LDR has coloured bands. (a) False (b) True
  11. 11.🧩 Which component is a resistance knob? (a) transistor (b) resistor (c) thermistor (d) potentiometer
  12. 12.True or false: a buzzer makes a beeping sound. (a) False (b) True
  13. 13.True or false: a resistor has coloured bands. (a) True (b) False
  14. 14.True or false: a thermistor has coloured bands. (a) True (b) False
  15. 15.🧩 Which component stores a little charge? (a) transistor (b) diode (c) capacitor (d) motor
  16. 16.What does an LDR do? (a) senses how hot it is (b) blows if current is high (c) glows using little power (d) senses how bright it is
  17. 17.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) resistor (d) motor
  18. 18.What does a resistor do? (a) boosts a small signal (b) beeps for an alarm (c) has coloured bands (d) glows using little power
  19. 19.What does a buzzer do? (a) lets current go one way (b) glows using little power (c) boosts a small signal (d) makes a beeping sound
  20. 20.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) resistor (d) buzzer
  21. 21.What does a diode do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) lets current go one way (d) beeps for an alarm
  22. 22.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) glows using little power (d) has coloured bands
  23. 23.True or false: a resistor blows if current is high. (a) False (b) True
  24. 24.What does a fuse do? (a) boosts a small signal (b) is a resistance knob (c) blows if current is high (d) senses how bright it is
  25. 25.🧩 Which component makes a beeping sound? (a) transistor (b) potentiometer (c) thermistor (d) buzzer
  26. 26.True or false: a potentiometer makes things spin. (a) True (b) False
  27. 27.True or false: a resistor limits the current. (a) True (b) False
  28. 28.True or false: a thermistor turns a fan or wheels. (a) False (b) True
  29. 29.🧩 Which component glows using little power? (a) capacitor (b) LED (c) diode (d) potentiometer
  30. 30.True or false: a thermistor senses how hot it is. (a) True (b) False
  31. 31.🧩 Which component beeps for an alarm? (a) resistor (b) fuse (c) potentiometer (d) buzzer
  32. 32.🧩 Which component turns a fan or wheels? (a) LED (b) buzzer (c) motor (d) thermistor
  33. 33.True or false: a motor has coloured bands. (a) True (b) False
  34. 34.True or false: a buzzer makes things spin. (a) False (b) True
  35. 35.True or false: a fuse blows if current is high. (a) False (b) True
  36. 36.True or false: a transistor boosts a small signal. (a) False (b) True
  37. 37.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) lets current go one way (d) makes a beeping sound
  38. 38.What does a motor do? (a) makes things spin (b) limits the current (c) senses how bright it is (d) stores a little charge
  39. 39.True or false: a buzzer senses how hot it is. (a) True (b) False
  40. 40.What does a potentiometer do? (a) boosts a small signal (b) limits the current (c) is a resistance knob (d) makes things spin

Answer key

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

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