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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 224 · 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.🧩 Which component glows using little power? (a) fuse (b) LED (c) potentiometer (d) diode
  2. 2.What does a potentiometer do? (a) boosts a small signal (b) limits the current (c) is a resistance knob (d) makes things spin
  3. 3.True or false: a fuse makes a beeping sound. (a) False (b) True
  4. 4.What does a diode do? (a) senses how hot it is (b) makes a beeping sound (c) lets current go one way (d) stores a little charge
  5. 5.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  6. 6.True or false: a motor makes things spin. (a) False (b) True
  7. 7.What does an LED do? (a) has coloured bands (b) glows using little power (c) makes things spin (d) is a resistance knob
  8. 8.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) limits the current (d) has coloured bands
  9. 9.True or false: a thermistor beeps for an alarm. (a) False (b) True
  10. 10.True or false: a buzzer beeps for an alarm. (a) True (b) False
  11. 11.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) beeps for an alarm (d) senses how hot it is
  12. 12.True or false: an LDR senses how bright it is. (a) True (b) False
  13. 13.True or false: a transistor boosts a small signal. (a) True (b) False
  14. 14.True or false: a thermistor senses how hot it is. (a) False (b) True
  15. 15.True or false: a buzzer makes a beeping sound. (a) True (b) False
  16. 16.🧩 Which component makes things spin? (a) motor (b) thermistor (c) LDR (d) buzzer
  17. 17.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) stores a little charge (d) glows using little power
  18. 18.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  19. 19.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) buzzer (d) LDR
  20. 20.True or false: a resistor limits the current. (a) True (b) False
  21. 21.True or false: a motor turns a fan or wheels. (a) True (b) False
  22. 22.True or false: a potentiometer has coloured bands. (a) True (b) False
  23. 23.🧩 Which component lets current go one way? (a) LED (b) diode (c) LDR (d) transistor
  24. 24.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) glows using little power (d) stores a little charge
  25. 25.True or false: an LED glows using little power. (a) False (b) True
  26. 26.True or false: a diode lets current go one way. (a) True (b) False
  27. 27.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) stores a little charge (d) senses how hot it is
  28. 28.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  29. 29.🧩 Which component is a resistance knob? (a) diode (b) buzzer (c) potentiometer (d) fuse
  30. 30.🧩 Which component limits the current? (a) fuse (b) thermistor (c) resistor (d) capacitor
  31. 31.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
  32. 32.True or false: a fuse beeps for an alarm. (a) False (b) True
  33. 33.True or false: a thermistor makes a beeping sound. (a) False (b) True
  34. 34.What does a capacitor do? (a) turns a fan or wheels (b) stores a little charge (c) blows if current is high (d) beeps for an alarm
  35. 35.🧩 Which component stores a little charge? (a) capacitor (b) fuse (c) LDR (d) resistor
  36. 36.True or false: a fuse lets current go one way. (a) True (b) False
  37. 37.🧩 Which component senses how hot it is? (a) buzzer (b) potentiometer (c) diode (d) thermistor
  38. 38.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) motor (d) resistor
  39. 39.True or false: a fuse senses how bright it is. (a) False (b) True
  40. 40.True or false: a resistor boosts a small signal. (a) True (b) False

Answer key

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

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