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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 442 · 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 an LDR do? (a) senses how bright it is (b) has coloured bands (c) turns a fan or wheels (d) lets current go one way
  2. 2.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) resistor (d) LDR
  3. 3.🧩 Which component is a resistance knob? (a) potentiometer (b) motor (c) capacitor (d) resistor
  4. 4.True or false: a potentiometer blows if current is high. (a) False (b) True
  5. 5.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  6. 6.True or false: a capacitor limits the current. (a) True (b) False
  7. 7.What does a capacitor do? (a) stores a little charge (b) beeps for an alarm (c) senses how bright it is (d) makes a beeping sound
  8. 8.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  10. 10.True or false: a buzzer is a resistance knob. (a) True (b) False
  11. 11.🧩 Which component beeps for an alarm? (a) buzzer (b) thermistor (c) motor (d) fuse
  12. 12.🧩 Which component limits the current? (a) capacitor (b) thermistor (c) LED (d) resistor
  13. 13.🧩 Which component makes a beeping sound? (a) thermistor (b) fuse (c) buzzer (d) LED
  14. 14.🧩 Which component turns a fan or wheels? (a) LDR (b) fuse (c) capacitor (d) motor
  15. 15.What does an LED do? (a) smooths a wobbly supply (b) stores a little charge (c) is a resistance knob (d) glows using little power
  16. 16.True or false: a diode is a resistance knob. (a) False (b) True
  17. 17.What does a thermistor do? (a) has coloured bands (b) smooths a wobbly supply (c) is a resistance knob (d) senses how hot it is
  18. 18.True or false: an LDR lets current go one way. (a) False (b) True
  19. 19.True or false: a diode lets current go one way. (a) False (b) True
  20. 20.True or false: a motor turns a fan or wheels. (a) False (b) True
  21. 21.What does a resistor do? (a) has coloured bands (b) lets current go one way (c) boosts a small signal (d) turns a fan or wheels
  22. 22.True or false: a capacitor stores a little charge. (a) False (b) True
  23. 23.True or false: a motor makes things spin. (a) False (b) True
  24. 24.True or false: a potentiometer is a resistance knob. (a) True (b) False
  25. 25.True or false: an LED beeps for an alarm. (a) True (b) False
  26. 26.🧩 Which component smooths a wobbly supply? (a) resistor (b) buzzer (c) potentiometer (d) capacitor
  27. 27.True or false: an LED glows using little power. (a) True (b) False
  28. 28.True or false: a buzzer blows if current is high. (a) True (b) False
  29. 29.What does a buzzer do? (a) senses how bright it is (b) has coloured bands (c) smooths a wobbly supply (d) beeps for an alarm
  30. 30.What does a capacitor do? (a) boosts a small signal (b) makes things spin (c) beeps for an alarm (d) smooths a wobbly supply
  31. 31.True or false: a potentiometer makes things spin. (a) False (b) True
  32. 32.True or false: a potentiometer limits the current. (a) True (b) False
  33. 33.🧩 Which component senses how hot it is? (a) LED (b) transistor (c) thermistor (d) motor
  34. 34.🧩 Which component boosts a small signal? (a) fuse (b) potentiometer (c) LDR (d) transistor
  35. 35.🧩 Which component senses how bright it is? (a) potentiometer (b) LDR (c) diode (d) transistor
  36. 36.True or false: a diode stores a little charge. (a) False (b) True
  37. 37.What does a diode do? (a) boosts a small signal (b) lets current go one way (c) blows if current is high (d) makes things spin
  38. 38.True or false: an LDR has coloured bands. (a) False (b) True
  39. 39.True or false: a resistor turns a fan or wheels. (a) False (b) True
  40. 40.🧩 Which component blows if current is high? (a) LDR (b) thermistor (c) resistor (d) fuse

Answer key

  1. senses how bright it is
  2. capacitor
  3. potentiometer
  4. False
  5. a buzzer
  6. False
  7. stores a little charge
  8. store charge briefly
  9. a motor
  10. False
  11. buzzer
  12. resistor
  13. buzzer
  14. motor
  15. glows using little power
  16. False
  17. senses how hot it is
  18. False
  19. True
  20. True
  21. has coloured bands
  22. True
  23. True
  24. True
  25. False
  26. capacitor
  27. True
  28. False
  29. beeps for an alarm
  30. smooths a wobbly supply
  31. False
  32. False
  33. thermistor
  34. transistor
  35. LDR
  36. False
  37. lets current go one way
  38. False
  39. False
  40. fuse

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