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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 227 · 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 potentiometer is a resistance knob. (a) True (b) False
  2. 2.🧩 Which component lets current go one way? (a) motor (b) resistor (c) LED (d) diode
  3. 3.What does an LED do? (a) is a resistance knob (b) glows using little power (c) turns a fan or wheels (d) smooths a wobbly supply
  4. 4.True or false: a buzzer senses how bright it is. (a) False (b) True
  5. 5.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) capacitor (d) thermistor
  6. 6.🧩 Which component limits the current? (a) fuse (b) transistor (c) motor (d) resistor
  7. 7.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) boosts a small signal (d) senses how hot it is
  8. 8.True or false: a diode makes things spin. (a) True (b) False
  9. 9.🧩 Which component is a resistance knob? (a) potentiometer (b) motor (c) fuse (d) resistor
  10. 10.True or false: a fuse turns a fan or wheels. (a) True (b) False
  11. 11.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  13. 13.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) LED (d) transistor
  14. 14.True or false: a capacitor makes a beeping sound. (a) False (b) True
  15. 15.True or false: a thermistor senses how hot it is. (a) False (b) True
  16. 16.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) beeps for an alarm (d) blows if current is high
  17. 17.True or false: an LDR senses how bright it is. (a) True (b) False
  18. 18.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  19. 19.What does a fuse do? (a) glows using little power (b) blows if current is high (c) boosts a small signal (d) senses how hot it is
  20. 20.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) senses how bright it is (d) is a resistance knob
  21. 21.True or false: a transistor boosts a small signal. (a) False (b) True
  22. 22.True or false: a motor glows using little power. (a) True (b) False
  23. 23.True or false: an LED turns a fan or wheels. (a) True (b) False
  24. 24.True or false: a potentiometer smooths a wobbly supply. (a) False (b) True
  25. 25.🧩 Which component senses how bright it is? (a) capacitor (b) resistor (c) motor (d) LDR
  26. 26.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  27. 27.What does a diode do? (a) lets current go one way (b) blows if current is high (c) makes things spin (d) smooths a wobbly supply
  28. 28.🧩 Which component smooths a wobbly supply? (a) resistor (b) LED (c) buzzer (d) capacitor
  29. 29.True or false: a motor turns a fan or wheels. (a) True (b) False
  30. 30.True or false: an LED boosts a small signal. (a) False (b) True
  31. 31.What does a buzzer do? (a) senses how hot it is (b) blows if current is high (c) glows using little power (d) beeps for an alarm
  32. 32.What does a potentiometer do? (a) turns a fan or wheels (b) blows if current is high (c) is a resistance knob (d) glows using little power
  33. 33.🧩 Which component makes things spin? (a) transistor (b) LED (c) fuse (d) motor
  34. 34.🧩 Which component glows using little power? (a) capacitor (b) thermistor (c) LED (d) transistor
  35. 35.What does a transistor do? (a) stores a little charge (b) glows using little power (c) lets current go one way (d) boosts a small signal
  36. 36.What does a thermistor do? (a) makes things spin (b) blows if current is high (c) senses how hot it is (d) beeps for an alarm
  37. 37.True or false: a resistor has coloured bands. (a) True (b) False
  38. 38.🧩 Which component turns a fan or wheels? (a) potentiometer (b) motor (c) diode (d) buzzer
  39. 39.True or false: a potentiometer stores a little charge. (a) True (b) False
  40. 40.🧩 Which component stores a little charge? (a) thermistor (b) potentiometer (c) capacitor (d) buzzer

Answer key

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

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