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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 623 · 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 resistor do? (a) has coloured bands (b) beeps for an alarm (c) is a resistance knob (d) makes things spin
  2. 2.🧩 Which component senses how bright it is? (a) potentiometer (b) thermistor (c) LDR (d) buzzer
  3. 3.True or false: a buzzer beeps for an alarm. (a) True (b) False
  4. 4.🧩 Which component is a resistance knob? (a) motor (b) buzzer (c) transistor (d) potentiometer
  5. 5.What does a diode do? (a) limits the current (b) lets current go one way (c) beeps for an alarm (d) senses how hot it is
  6. 6.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) fuse (d) capacitor
  7. 7.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  8. 8.True or false: an LED glows using little power. (a) False (b) True
  9. 9.🧩 Which component blows if current is high? (a) fuse (b) thermistor (c) LDR (d) diode
  10. 10.True or false: a resistor limits the current. (a) True (b) False
  11. 11.True or false: a potentiometer blows if current is high. (a) False (b) True
  12. 12.True or false: a thermistor senses how hot it is. (a) False (b) True
  13. 13.True or false: a potentiometer is a resistance knob. (a) True (b) False
  14. 14.What does a buzzer do? (a) makes a beeping sound (b) glows using little power (c) is a resistance knob (d) smooths a wobbly supply
  15. 15.What does a fuse do? (a) boosts a small signal (b) has coloured bands (c) blows if current is high (d) makes things spin
  16. 16.True or false: a motor turns a fan or wheels. (a) True (b) False
  17. 17.🧩 Which component senses how hot it is? (a) motor (b) thermistor (c) resistor (d) buzzer
  18. 18.What does a motor do? (a) limits the current (b) makes things spin (c) senses how bright it is (d) beeps for an alarm
  19. 19.True or false: a buzzer makes a beeping sound. (a) False (b) True
  20. 20.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  21. 21.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) fuse (d) buzzer
  22. 22.True or false: a resistor makes a beeping sound. (a) False (b) True
  23. 23.True or false: an LED stores a little charge. (a) True (b) False
  24. 24.True or false: a potentiometer has coloured bands. (a) False (b) True
  25. 25.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  26. 26.🧩 Which component turns a fan or wheels? (a) thermistor (b) buzzer (c) motor (d) resistor
  27. 27.🧩 Which component beeps for an alarm? (a) motor (b) capacitor (c) diode (d) buzzer
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  29. 29.What does a buzzer do? (a) boosts a small signal (b) smooths a wobbly supply (c) beeps for an alarm (d) stores a little charge
  30. 30.True or false: a resistor has coloured bands. (a) True (b) False
  31. 31.True or false: a capacitor stores a little charge. (a) False (b) True
  32. 32.True or false: a resistor senses how bright it is. (a) True (b) False
  33. 33.🧩 Which component makes a beeping sound? (a) capacitor (b) resistor (c) buzzer (d) transistor
  34. 34.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  35. 35.🧩 Which component limits the current? (a) diode (b) fuse (c) resistor (d) LED
  36. 36.True or false: an LDR blows if current is high. (a) False (b) True
  37. 37.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a fuse is a resistance knob. (a) False (b) True
  39. 39.What does a thermistor do? (a) limits the current (b) lets current go one way (c) senses how hot it is (d) makes a beeping sound
  40. 40.True or false: a fuse senses how hot it is. (a) True (b) False

Answer key

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

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