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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 500 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  2. 2.🧩 Which component glows using little power? (a) fuse (b) capacitor (c) thermistor (d) LED
  3. 3.🧩 Which component smooths a wobbly supply? (a) transistor (b) capacitor (c) LED (d) potentiometer
  4. 4.What does a capacitor do? (a) makes a beeping sound (b) turns a fan or wheels (c) stores a little charge (d) senses how bright it is
  5. 5.🧩 Which component beeps for an alarm? (a) buzzer (b) LDR (c) LED (d) motor
  6. 6.True or false: a diode limits the current. (a) True (b) False
  7. 7.True or false: a transistor boosts a small signal. (a) True (b) False
  8. 8.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  9. 9.True or false: an LDR makes things spin. (a) False (b) True
  10. 10.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) makes a beeping sound (d) makes things spin
  11. 11.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) capacitor (d) diode
  12. 12.What does an LED do? (a) lets current go one way (b) blows if current is high (c) turns a fan or wheels (d) glows using little power
  13. 13.What does an LDR do? (a) makes a beeping sound (b) senses how bright it is (c) smooths a wobbly supply (d) beeps for an alarm
  14. 14.True or false: a resistor limits the current. (a) True (b) False
  15. 15.True or false: an LED limits the current. (a) True (b) False
  16. 16.What does a diode do? (a) has coloured bands (b) makes a beeping sound (c) lets current go one way (d) smooths a wobbly supply
  17. 17.True or false: an LDR is a resistance knob. (a) True (b) False
  18. 18.What does a buzzer do? (a) glows using little power (b) turns a fan or wheels (c) beeps for an alarm (d) makes things spin
  19. 19.🧩 Which component blows if current is high? (a) buzzer (b) diode (c) fuse (d) transistor
  20. 20.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) blows if current is high (d) smooths a wobbly supply
  21. 21.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) LED (d) potentiometer
  22. 22.🧩 Which component limits the current? (a) buzzer (b) resistor (c) diode (d) motor
  23. 23.🧩 Which component turns a fan or wheels? (a) motor (b) buzzer (c) transistor (d) LED
  24. 24.What does a motor do? (a) blows if current is high (b) makes things spin (c) beeps for an alarm (d) smooths a wobbly supply
  25. 25.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) capacitor (d) buzzer
  26. 26.True or false: a potentiometer limits the current. (a) True (b) False
  27. 27.True or false: an LED glows using little power. (a) True (b) False
  28. 28.What does a thermistor do? (a) boosts a small signal (b) beeps for an alarm (c) glows using little power (d) senses how hot it is
  29. 29.True or false: a transistor turns a fan or wheels. (a) False (b) True
  30. 30.🧩 Which component is a resistance knob? (a) resistor (b) fuse (c) potentiometer (d) LDR
  31. 31.True or false: a resistor blows if current is high. (a) True (b) False
  32. 32.True or false: a fuse blows if current is high. (a) False (b) True
  33. 33.🧩 Which component lets current go one way? (a) LDR (b) diode (c) buzzer (d) motor
  34. 34.True or false: a motor is a resistance knob. (a) True (b) False
  35. 35.True or false: a diode lets current go one way. (a) False (b) True
  36. 36.What does a fuse do? (a) glows using little power (b) blows if current is high (c) beeps for an alarm (d) lets current go one way
  37. 37.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  38. 38.What does a buzzer do? (a) makes a beeping sound (b) lets current go one way (c) glows using little power (d) senses how hot it is
  39. 39.🧩 Which component senses how hot it is? (a) motor (b) capacitor (c) thermistor (d) buzzer
  40. 40.True or false: a transistor makes a beeping sound. (a) False (b) True

Answer key

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

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