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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 622 · 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.True or false: a resistor has coloured bands. (a) False (b) True
  2. 2.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  3. 3.True or false: a potentiometer is a resistance knob. (a) False (b) True
  4. 4.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) beeps for an alarm (d) boosts a small signal
  5. 5.🧩 Which component stores a little charge? (a) buzzer (b) fuse (c) potentiometer (d) capacitor
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  7. 7.What does an LED do? (a) blows if current is high (b) senses how hot it is (c) glows using little power (d) limits the current
  8. 8.What does an LDR do? (a) lets current go one way (b) has coloured bands (c) senses how bright it is (d) makes a beeping sound
  9. 9.What does a fuse do? (a) has coloured bands (b) senses how bright it is (c) blows if current is high (d) stores a little charge
  10. 10.What does a resistor do? (a) blows if current is high (b) has coloured bands (c) glows using little power (d) is a resistance knob
  11. 11.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  12. 12.True or false: a transistor stores a little charge. (a) True (b) False
  13. 13.What does a diode do? (a) turns a fan or wheels (b) boosts a small signal (c) makes things spin (d) lets current go one way
  14. 14.True or false: an LED senses how hot it is. (a) False (b) True
  15. 15.What does a resistor do? (a) blows if current is high (b) senses how hot it is (c) limits the current (d) glows using little power
  16. 16.True or false: a fuse beeps for an alarm. (a) True (b) False
  17. 17.True or false: a thermistor senses how hot it is. (a) False (b) True
  18. 18.🧩 Which component has coloured bands? (a) potentiometer (b) LED (c) capacitor (d) resistor
  19. 19.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) thermistor (d) LDR
  20. 20.True or false: a fuse blows if current is high. (a) True (b) False
  21. 21.True or false: a transistor boosts a small signal. (a) False (b) True
  22. 22.True or false: a buzzer stores a little charge. (a) False (b) True
  23. 23.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  24. 24.True or false: a fuse turns a fan or wheels. (a) True (b) False
  25. 25.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  26. 26.True or false: a fuse smooths a wobbly supply. (a) True (b) False
  27. 27.True or false: a capacitor stores a little charge. (a) False (b) True
  28. 28.True or false: a diode makes a beeping sound. (a) True (b) False
  29. 29.True or false: a fuse senses how bright it is. (a) True (b) False
  30. 30.What does a buzzer do? (a) makes a beeping sound (b) turns a fan or wheels (c) makes things spin (d) glows using little power
  31. 31.True or false: a buzzer beeps for an alarm. (a) True (b) False
  32. 32.🧩 Which component limits the current? (a) diode (b) buzzer (c) thermistor (d) resistor
  33. 33.True or false: a buzzer makes a beeping sound. (a) False (b) True
  34. 34.What does a potentiometer do? (a) turns a fan or wheels (b) makes things spin (c) is a resistance knob (d) beeps for an alarm
  35. 35.🧩 Which component blows if current is high? (a) fuse (b) LED (c) thermistor (d) resistor
  36. 36.What does a capacitor do? (a) limits the current (b) lets current go one way (c) turns a fan or wheels (d) smooths a wobbly supply
  37. 37.🧩 Which component glows using little power? (a) potentiometer (b) capacitor (c) transistor (d) LED
  38. 38.🧩 Which component makes things spin? (a) motor (b) capacitor (c) diode (d) resistor
  39. 39.What does a motor do? (a) limits the current (b) lets current go one way (c) makes things spin (d) stores a little charge
  40. 40.True or false: a resistor is a resistance knob. (a) False (b) True

Answer key

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

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