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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 319 · 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 glows using little power. (a) False (b) True
  2. 2.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) motor (d) transistor
  3. 3.🧩 Which component glows using little power? (a) LED (b) diode (c) capacitor (d) transistor
  4. 4.True or false: a thermistor lets current go one way. (a) True (b) False
  5. 5.🧩 Which component is a resistance knob? (a) resistor (b) buzzer (c) potentiometer (d) thermistor
  6. 6.🧩 Which component makes things spin? (a) resistor (b) motor (c) fuse (d) potentiometer
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  8. 8.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  10. 10.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) fuse (d) LED
  11. 11.True or false: a motor makes a beeping sound. (a) True (b) False
  12. 12.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) LED (d) LDR
  13. 13.What does a potentiometer do? (a) has coloured bands (b) senses how hot it is (c) senses how bright it is (d) is a resistance knob
  14. 14.What does a capacitor do? (a) glows using little power (b) senses how bright it is (c) makes a beeping sound (d) stores a little charge
  15. 15.🧩 Which component makes a beeping sound? (a) transistor (b) thermistor (c) buzzer (d) fuse
  16. 16.🧩 Which component limits the current? (a) resistor (b) motor (c) LED (d) transistor
  17. 17.True or false: a capacitor stores a little charge. (a) False (b) True
  18. 18.🧩 Which component senses how hot it is? (a) LDR (b) resistor (c) thermistor (d) potentiometer
  19. 19.True or false: a transistor lets current go one way. (a) False (b) True
  20. 20.What does a transistor do? (a) glows using little power (b) smooths a wobbly supply (c) boosts a small signal (d) stores a little charge
  21. 21.What does a thermistor do? (a) glows using little power (b) senses how hot it is (c) stores a little charge (d) senses how bright it is
  22. 22.True or false: an LED glows using little power. (a) True (b) False
  23. 23.🧩 Which component smooths a wobbly supply? (a) motor (b) transistor (c) buzzer (d) capacitor
  24. 24.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  25. 25.What does an LED do? (a) limits the current (b) smooths a wobbly supply (c) glows using little power (d) turns a fan or wheels
  26. 26.True or false: a resistor has coloured bands. (a) False (b) True
  27. 27.What does a buzzer do? (a) stores a little charge (b) limits the current (c) glows using little power (d) beeps for an alarm
  28. 28.True or false: a motor makes things spin. (a) False (b) True
  29. 29.🧩 Which component stores a little charge? (a) diode (b) potentiometer (c) capacitor (d) LED
  30. 30.True or false: a transistor makes a beeping sound. (a) False (b) True
  31. 31.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) potentiometer (d) buzzer
  32. 32.True or false: an LED blows if current is high. (a) True (b) False
  33. 33.What does a capacitor do? (a) makes a beeping sound (b) lets current go one way (c) beeps for an alarm (d) smooths a wobbly supply
  34. 34.True or false: a transistor makes things spin. (a) True (b) False
  35. 35.True or false: a thermistor senses how hot it is. (a) False (b) True
  36. 36.🧩 Which component has coloured bands? (a) motor (b) capacitor (c) thermistor (d) resistor
  37. 37.True or false: a buzzer makes a beeping sound. (a) True (b) False
  38. 38.True or false: a capacitor senses how bright it is. (a) False (b) True
  39. 39.What does a buzzer do? (a) makes things spin (b) lets current go one way (c) makes a beeping sound (d) stores a little charge
  40. 40.What does a resistor do? (a) limits the current (b) lets current go one way (c) makes a beeping sound (d) is a resistance knob

Answer key

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

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