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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 149 · 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 a capacitor do? (a) is a resistance knob (b) senses how bright it is (c) turns a fan or wheels (d) stores a little charge
  2. 2.True or false: a resistor glows using little power. (a) False (b) True
  3. 3.True or false: a diode lets current go one way. (a) True (b) False
  4. 4.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) transistor (d) resistor
  5. 5.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) glows using little power (d) stores a little charge
  6. 6.True or false: a motor has coloured bands. (a) True (b) False
  7. 7.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) fuse (d) capacitor
  8. 8.🧩 Which component makes things spin? (a) fuse (b) capacitor (c) transistor (d) motor
  9. 9.True or false: a fuse blows if current is high. (a) False (b) True
  10. 10.What does a motor do? (a) boosts a small signal (b) glows using little power (c) is a resistance knob (d) makes things spin
  11. 11.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) blows if current is high (d) makes a beeping sound
  12. 12.🧩 Which component turns a fan or wheels? (a) buzzer (b) LDR (c) motor (d) LED
  13. 13.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  14. 14.What does a resistor do? (a) senses how hot it is (b) senses how bright it is (c) limits the current (d) stores a little charge
  15. 15.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  16. 16.What does a diode do? (a) makes a beeping sound (b) beeps for an alarm (c) lets current go one way (d) smooths a wobbly supply
  17. 17.🧩 Which component lets current go one way? (a) transistor (b) thermistor (c) LED (d) diode
  18. 18.True or false: a resistor has coloured bands. (a) True (b) False
  19. 19.True or false: an LDR has coloured bands. (a) False (b) True
  20. 20.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) fuse (d) resistor
  21. 21.🧩 Which component blows if current is high? (a) motor (b) resistor (c) fuse (d) LDR
  22. 22.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  23. 23.🧩 Which component has coloured bands? (a) potentiometer (b) LED (c) resistor (d) transistor
  24. 24.True or false: an LED glows using little power. (a) True (b) False
  25. 25.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) makes things spin (d) turns a fan or wheels
  26. 26.True or false: a motor turns a fan or wheels. (a) False (b) True
  27. 27.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) LED (d) capacitor
  28. 28.True or false: a thermistor glows using little power. (a) True (b) False
  29. 29.🧩 Which component senses how bright it is? (a) LDR (b) resistor (c) buzzer (d) thermistor
  30. 30.What does a motor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) stores a little charge (d) turns a fan or wheels
  31. 31.What does an LDR do? (a) is a resistance knob (b) senses how hot it is (c) senses how bright it is (d) makes things spin
  32. 32.🧩 Which component is a resistance knob? (a) diode (b) capacitor (c) potentiometer (d) motor
  33. 33.🧩 Which component beeps for an alarm? (a) thermistor (b) transistor (c) buzzer (d) LDR
  34. 34.What does a transistor do? (a) limits the current (b) has coloured bands (c) glows using little power (d) boosts a small signal
  35. 35.True or false: a capacitor stores a little charge. (a) True (b) False
  36. 36.What does a potentiometer do? (a) limits the current (b) senses how hot it is (c) senses how bright it is (d) is a resistance knob
  37. 37.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) senses how hot it is (d) senses how bright it is
  38. 38.True or false: a potentiometer has coloured bands. (a) True (b) False
  39. 39.🧩 Which component glows using little power? (a) motor (b) potentiometer (c) LED (d) resistor
  40. 40.🧩 Which component limits the current? (a) LDR (b) thermistor (c) diode (d) resistor

Answer key

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

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