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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 253 · 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) stores a little charge (b) is a resistance knob (c) lets current go one way (d) turns a fan or wheels
  2. 2.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  3. 3.True or false: a capacitor beeps for an alarm. (a) True (b) False
  4. 4.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) buzzer (d) potentiometer
  5. 5.🧩 Which component turns a fan or wheels? (a) thermistor (b) LDR (c) fuse (d) motor
  6. 6.What does a buzzer do? (a) limits the current (b) smooths a wobbly supply (c) beeps for an alarm (d) turns a fan or wheels
  7. 7.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) LED (d) buzzer
  8. 8.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  9. 9.🧩 Which component senses how hot it is? (a) resistor (b) buzzer (c) diode (d) thermistor
  10. 10.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) motor (d) resistor
  11. 11.What does a resistor do? (a) has coloured bands (b) blows if current is high (c) beeps for an alarm (d) senses how hot it is
  12. 12.What does a thermistor do? (a) makes a beeping sound (b) has coloured bands (c) smooths a wobbly supply (d) senses how hot it is
  13. 13.What does an LED do? (a) blows if current is high (b) senses how hot it is (c) beeps for an alarm (d) glows using little power
  14. 14.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) LED (d) buzzer
  15. 15.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) fuse (d) LED
  16. 16.What does a motor do? (a) senses how bright it is (b) blows if current is high (c) makes things spin (d) is a resistance knob
  17. 17.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) capacitor (d) thermistor
  18. 18.What does a resistor do? (a) turns a fan or wheels (b) limits the current (c) beeps for an alarm (d) senses how bright it is
  19. 19.What does a capacitor do? (a) limits the current (b) makes things spin (c) smooths a wobbly supply (d) boosts a small signal
  20. 20.True or false: a resistor has coloured bands. (a) False (b) True
  21. 21.🧩 Which component blows if current is high? (a) LDR (b) fuse (c) resistor (d) buzzer
  22. 22.🧩 Which component glows using little power? (a) LDR (b) buzzer (c) LED (d) potentiometer
  23. 23.True or false: a motor smooths a wobbly supply. (a) False (b) True
  24. 24.🧩 Which component is a resistance knob? (a) motor (b) fuse (c) resistor (d) potentiometer
  25. 25.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  26. 26.What does a buzzer do? (a) senses how hot it is (b) smooths a wobbly supply (c) boosts a small signal (d) makes a beeping sound
  27. 27.True or false: a transistor boosts a small signal. (a) False (b) True
  28. 28.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  29. 29.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  30. 30.What does a fuse do? (a) senses how bright it is (b) lets current go one way (c) stores a little charge (d) blows if current is high
  31. 31.True or false: a motor senses how hot it is. (a) False (b) True
  32. 32.True or false: a capacitor stores a little charge. (a) True (b) False
  33. 33.True or false: a buzzer makes a beeping sound. (a) False (b) True
  34. 34.What does an LDR do? (a) stores a little charge (b) limits the current (c) has coloured bands (d) senses how bright it is
  35. 35.What does a potentiometer do? (a) stores a little charge (b) is a resistance knob (c) smooths a wobbly supply (d) senses how bright it is
  36. 36.True or false: a buzzer makes things spin. (a) True (b) False
  37. 37.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) motor (d) LDR
  38. 38.🧩 Which component beeps for an alarm? (a) transistor (b) LDR (c) buzzer (d) capacitor
  39. 39.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) glows using little power (d) lets current go one way
  40. 40.True or false: a transistor makes things spin. (a) False (b) True

Answer key

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

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