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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 152 · 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) senses how hot it is (b) lets current go one way (c) makes a beeping sound (d) smooths a wobbly supply
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  3. 3.What does a potentiometer do? (a) turns a fan or wheels (b) senses how hot it is (c) makes a beeping sound (d) is a resistance knob
  4. 4.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  5. 5.True or false: a thermistor is a resistance knob. (a) True (b) False
  6. 6.🧩 Which component glows using little power? (a) capacitor (b) transistor (c) LED (d) resistor
  7. 7.What does a resistor do? (a) lets current go one way (b) smooths a wobbly supply (c) makes a beeping sound (d) has coloured bands
  8. 8.🧩 Which component stores a little charge? (a) motor (b) buzzer (c) capacitor (d) transistor
  9. 9.True or false: a buzzer makes a beeping sound. (a) True (b) False
  10. 10.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) is a resistance knob (d) limits the current
  11. 11.🧩 Which component limits the current? (a) fuse (b) capacitor (c) resistor (d) LDR
  12. 12.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  13. 13.True or false: an LED glows using little power. (a) True (b) False
  14. 14.What does a fuse do? (a) is a resistance knob (b) stores a little charge (c) blows if current is high (d) glows using little power
  15. 15.True or false: a thermistor lets current go one way. (a) False (b) True
  16. 16.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) transistor (d) thermistor
  17. 17.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) capacitor (d) LDR
  18. 18.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  19. 19.🧩 Which component makes things spin? (a) buzzer (b) thermistor (c) potentiometer (d) motor
  20. 20.True or false: an LDR turns a fan or wheels. (a) True (b) False
  21. 21.True or false: a motor is a resistance knob. (a) True (b) False
  22. 22.True or false: a potentiometer has coloured bands. (a) True (b) False
  23. 23.True or false: a resistor has coloured bands. (a) True (b) False
  24. 24.True or false: a resistor limits the current. (a) False (b) True
  25. 25.True or false: a buzzer is a resistance knob. (a) True (b) False
  26. 26.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  27. 27.True or false: a potentiometer glows using little power. (a) False (b) True
  28. 28.🧩 Which component senses how hot it is? (a) LED (b) buzzer (c) motor (d) thermistor
  29. 29.What does a thermistor do? (a) makes things spin (b) senses how hot it is (c) senses how bright it is (d) blows if current is high
  30. 30.True or false: a fuse limits the current. (a) False (b) True
  31. 31.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  32. 32.What does a diode do? (a) stores a little charge (b) lets current go one way (c) glows using little power (d) boosts a small signal
  33. 33.🧩 Which component turns a fan or wheels? (a) fuse (b) capacitor (c) motor (d) LED
  34. 34.🧩 Which component lets current go one way? (a) fuse (b) diode (c) capacitor (d) resistor
  35. 35.What does a motor do? (a) has coloured bands (b) makes things spin (c) glows using little power (d) stores a little charge
  36. 36.True or false: a potentiometer limits the current. (a) True (b) False
  37. 37.🧩 Which component is a resistance knob? (a) diode (b) motor (c) buzzer (d) potentiometer
  38. 38.True or false: an LDR senses how bright it is. (a) False (b) True
  39. 39.What does a resistor do? (a) lets current go one way (b) makes a beeping sound (c) makes things spin (d) limits the current
  40. 40.What does a motor do? (a) stores a little charge (b) is a resistance knob (c) limits the current (d) turns a fan or wheels

Answer key

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

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