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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 687 · 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 boosts a small signal? (a) LED (b) resistor (c) transistor (d) LDR
  2. 2.True or false: a motor senses how hot it is. (a) False (b) True
  3. 3.True or false: a fuse makes things spin. (a) False (b) True
  4. 4.True or false: a motor is a resistance knob. (a) True (b) False
  5. 5.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) LDR (d) resistor
  6. 6.What does a capacitor do? (a) is a resistance knob (b) boosts a small signal (c) senses how bright it is (d) stores a little charge
  7. 7.🧩 Which component stores a little charge? (a) diode (b) motor (c) LDR (d) capacitor
  8. 8.What does an LED do? (a) blows if current is high (b) has coloured bands (c) limits the current (d) glows using little power
  9. 9.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) thermistor (d) fuse
  10. 10.What does an LDR do? (a) makes things spin (b) has coloured bands (c) turns a fan or wheels (d) senses how bright it is
  11. 11.True or false: a capacitor stores a little charge. (a) True (b) False
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  13. 13.True or false: a motor turns a fan or wheels. (a) False (b) True
  14. 14.True or false: a diode makes a beeping sound. (a) True (b) False
  15. 15.🧩 Which component has coloured bands? (a) LDR (b) buzzer (c) motor (d) resistor
  16. 16.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  17. 17.True or false: a resistor lets current go one way. (a) False (b) True
  18. 18.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  19. 19.True or false: a buzzer senses how hot it is. (a) False (b) True
  20. 20.🧩 Which component makes a beeping sound? (a) capacitor (b) fuse (c) buzzer (d) thermistor
  21. 21.True or false: a motor smooths a wobbly supply. (a) True (b) False
  22. 22.True or false: an LDR senses how bright it is. (a) True (b) False
  23. 23.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) has coloured bands (d) blows if current is high
  24. 24.🧩 Which component smooths a wobbly supply? (a) buzzer (b) thermistor (c) resistor (d) capacitor
  25. 25.True or false: an LDR lets current go one way. (a) True (b) False
  26. 26.True or false: a motor makes things spin. (a) True (b) False
  27. 27.True or false: a resistor has coloured bands. (a) True (b) False
  28. 28.True or false: an LED glows using little power. (a) True (b) False
  29. 29.True or false: a buzzer makes a beeping sound. (a) True (b) False
  30. 30.🧩 Which component limits the current? (a) LED (b) fuse (c) capacitor (d) resistor
  31. 31.🧩 Which component makes things spin? (a) LDR (b) thermistor (c) motor (d) transistor
  32. 32.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) motor (d) diode
  33. 33.True or false: a resistor blows if current is high. (a) False (b) True
  34. 34.True or false: an LED beeps for an alarm. (a) False (b) True
  35. 35.True or false: a resistor boosts a small signal. (a) True (b) False
  36. 36.True or false: a resistor senses how bright it is. (a) True (b) False
  37. 37.What does a diode do? (a) beeps for an alarm (b) stores a little charge (c) lets current go one way (d) smooths a wobbly supply
  38. 38.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) motor (d) capacitor
  39. 39.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) makes a beeping sound (d) stores a little charge
  40. 40.What does a thermistor do? (a) turns a fan or wheels (b) limits the current (c) senses how hot it is (d) has coloured bands

Answer key

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

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