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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 43 · 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) motor (b) fuse (c) transistor (d) resistor
  2. 2.🧩 Which component stores a little charge? (a) motor (b) diode (c) capacitor (d) potentiometer
  3. 3.True or false: a motor makes things spin. (a) True (b) False
  4. 4.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  5. 5.True or false: a thermistor limits the current. (a) False (b) True
  6. 6.True or false: a resistor has coloured bands. (a) False (b) True
  7. 7.True or false: a transistor is a resistance knob. (a) False (b) True
  8. 8.True or false: a fuse turns a fan or wheels. (a) True (b) False
  9. 9.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) buzzer (d) resistor
  10. 10.True or false: an LED limits the current. (a) False (b) True
  11. 11.🧩 Which component makes a beeping sound? (a) LDR (b) motor (c) transistor (d) buzzer
  12. 12.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  13. 13.What does a motor do? (a) turns a fan or wheels (b) lets current go one way (c) limits the current (d) stores a little charge
  14. 14.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  15. 15.🧩 Which component turns a fan or wheels? (a) transistor (b) motor (c) thermistor (d) LED
  16. 16.What does a fuse do? (a) is a resistance knob (b) smooths a wobbly supply (c) blows if current is high (d) turns a fan or wheels
  17. 17.🧩 Which component has coloured bands? (a) motor (b) transistor (c) diode (d) resistor
  18. 18.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) is a resistance knob (d) stores a little charge
  19. 19.True or false: a buzzer has coloured bands. (a) True (b) False
  20. 20.🧩 Which component glows using little power? (a) motor (b) LED (c) diode (d) potentiometer
  21. 21.What does a capacitor do? (a) makes a beeping sound (b) limits the current (c) smooths a wobbly supply (d) turns a fan or wheels
  22. 22.What does a resistor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) is a resistance knob (d) limits the current
  23. 23.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) glows using little power (d) lets current go one way
  24. 24.True or false: a diode lets current go one way. (a) True (b) False
  25. 25.True or false: an LDR boosts a small signal. (a) True (b) False
  26. 26.True or false: a motor glows using little power. (a) False (b) True
  27. 27.True or false: a fuse lets current go one way. (a) True (b) False
  28. 28.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) resistor (d) motor
  29. 29.True or false: a fuse blows if current is high. (a) True (b) False
  30. 30.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) motor (d) resistor
  31. 31.What does a potentiometer do? (a) boosts a small signal (b) makes a beeping sound (c) is a resistance knob (d) has coloured bands
  32. 32.What does an LED do? (a) glows using little power (b) lets current go one way (c) makes a beeping sound (d) is a resistance knob
  33. 33.What does a diode do? (a) is a resistance knob (b) senses how bright it is (c) makes things spin (d) lets current go one way
  34. 34.What does a thermistor do? (a) senses how hot it is (b) lets current go one way (c) limits the current (d) glows using little power
  35. 35.True or false: a motor lets current go one way. (a) True (b) False
  36. 36.What does a transistor do? (a) turns a fan or wheels (b) stores a little charge (c) boosts a small signal (d) makes things spin
  37. 37.True or false: a buzzer beeps for an alarm. (a) True (b) False
  38. 38.True or false: a potentiometer is a resistance knob. (a) True (b) False
  39. 39.🧩 Which component blows if current is high? (a) diode (b) resistor (c) fuse (d) LDR
  40. 40.True or false: a resistor limits the current. (a) True (b) False

Answer key

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

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