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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 632 · 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.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) resistor (d) buzzer
  2. 2.What does a diode do? (a) is a resistance knob (b) senses how hot it is (c) makes a beeping sound (d) lets current go one way
  3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  4. 4.🧩 Which component limits the current? (a) resistor (b) diode (c) LDR (d) motor
  5. 5.What does a buzzer do? (a) stores a little charge (b) senses how bright it is (c) turns a fan or wheels (d) beeps for an alarm
  6. 6.🧩 Which component senses how hot it is? (a) capacitor (b) fuse (c) thermistor (d) transistor
  7. 7.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  8. 8.True or false: an LED smooths a wobbly supply. (a) False (b) True
  9. 9.What does an LDR do? (a) senses how bright it is (b) blows if current is high (c) limits the current (d) makes things spin
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  11. 11.True or false: a motor makes things spin. (a) False (b) True
  12. 12.True or false: a capacitor glows using little power. (a) True (b) False
  13. 13.True or false: a diode turns a fan or wheels. (a) True (b) False
  14. 14.True or false: a transistor turns a fan or wheels. (a) False (b) True
  15. 15.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) fuse (d) resistor
  16. 16.True or false: a buzzer makes a beeping sound. (a) True (b) False
  17. 17.True or false: a motor glows using little power. (a) True (b) False
  18. 18.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) diode (d) resistor
  19. 19.🧩 Which component glows using little power? (a) diode (b) fuse (c) LDR (d) LED
  20. 20.What does a buzzer do? (a) boosts a small signal (b) makes a beeping sound (c) limits the current (d) lets current go one way
  21. 21.🧩 Which component has coloured bands? (a) capacitor (b) diode (c) transistor (d) resistor
  22. 22.True or false: a potentiometer limits the current. (a) False (b) True
  23. 23.True or false: an LDR lets current go one way. (a) True (b) False
  24. 24.What does a capacitor do? (a) turns a fan or wheels (b) limits the current (c) smooths a wobbly supply (d) senses how hot it is
  25. 25.What does a transistor do? (a) blows if current is high (b) smooths a wobbly supply (c) boosts a small signal (d) has coloured bands
  26. 26.True or false: a fuse blows if current is high. (a) True (b) False
  27. 27.🧩 Which component senses how bright it is? (a) motor (b) fuse (c) LDR (d) transistor
  28. 28.🧩 Which component blows if current is high? (a) transistor (b) motor (c) potentiometer (d) fuse
  29. 29.What does a motor do? (a) turns a fan or wheels (b) blows if current is high (c) senses how hot it is (d) lets current go one way
  30. 30.True or false: a motor smooths a wobbly supply. (a) False (b) True
  31. 31.🧩 Which component makes things spin? (a) resistor (b) fuse (c) motor (d) buzzer
  32. 32.What does a thermistor do? (a) beeps for an alarm (b) stores a little charge (c) senses how hot it is (d) limits the current
  33. 33.True or false: a potentiometer is a resistance knob. (a) False (b) True
  34. 34.True or false: a capacitor stores a little charge. (a) True (b) False
  35. 35.🧩 Which component smooths a wobbly supply? (a) thermistor (b) LDR (c) capacitor (d) resistor
  36. 36.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) turns a fan or wheels (d) blows if current is high
  37. 37.What does a fuse do? (a) stores a little charge (b) turns a fan or wheels (c) smooths a wobbly supply (d) blows if current is high
  38. 38.True or false: a motor boosts a small signal. (a) True (b) False
  39. 39.True or false: a motor is a resistance knob. (a) True (b) False
  40. 40.What does a resistor do? (a) makes a beeping sound (b) limits the current (c) beeps for an alarm (d) glows using little power

Answer key

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

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