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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 168 · 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) beeps for an alarm (b) limits the current (c) smooths a wobbly supply (d) boosts a small signal
  2. 2.True or false: a fuse senses how hot it is. (a) True (b) False
  3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  6. 6.What does a diode do? (a) has coloured bands (b) limits the current (c) stores a little charge (d) lets current go one way
  7. 7.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) potentiometer (d) LED
  8. 8.What does a potentiometer do? (a) limits the current (b) smooths a wobbly supply (c) lets current go one way (d) is a resistance knob
  9. 9.True or false: a motor turns a fan or wheels. (a) True (b) False
  10. 10.True or false: a motor senses how hot it is. (a) False (b) True
  11. 11.What does a capacitor do? (a) smooths a wobbly supply (b) boosts a small signal (c) limits the current (d) makes things spin
  12. 12.True or false: a fuse stores a little charge. (a) False (b) True
  13. 13.What does a resistor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) stores a little charge (d) has coloured bands
  14. 14.🧩 Which component senses how bright it is? (a) resistor (b) capacitor (c) LDR (d) diode
  15. 15.True or false: a capacitor stores a little charge. (a) True (b) False
  16. 16.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) potentiometer (d) LED
  17. 17.What does an LDR do? (a) stores a little charge (b) turns a fan or wheels (c) senses how bright it is (d) has coloured bands
  18. 18.🧩 Which component smooths a wobbly supply? (a) resistor (b) buzzer (c) capacitor (d) fuse
  19. 19.True or false: a capacitor makes a beeping sound. (a) False (b) True
  20. 20.🧩 Which component glows using little power? (a) potentiometer (b) capacitor (c) LED (d) buzzer
  21. 21.What does a motor do? (a) has coloured bands (b) is a resistance knob (c) senses how hot it is (d) makes things spin
  22. 22.What does a thermistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) makes things spin (d) limits the current
  23. 23.True or false: an LDR senses how bright it is. (a) False (b) True
  24. 24.True or false: a resistor makes a beeping sound. (a) True (b) False
  25. 25.What does a transistor do? (a) beeps for an alarm (b) is a resistance knob (c) boosts a small signal (d) senses how bright it is
  26. 26.True or false: an LED glows using little power. (a) True (b) False
  27. 27.True or false: a resistor limits the current. (a) True (b) False
  28. 28.🧩 Which component makes things spin? (a) motor (b) resistor (c) transistor (d) diode
  29. 29.True or false: a motor is a resistance knob. (a) False (b) True
  30. 30.🧩 Which component has coloured bands? (a) LDR (b) diode (c) thermistor (d) resistor
  31. 31.True or false: a diode makes a beeping sound. (a) True (b) False
  32. 32.True or false: an LED has coloured bands. (a) False (b) True
  33. 33.True or false: a diode lets current go one way. (a) True (b) False
  34. 34.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) fuse (d) LDR
  35. 35.What does an LED do? (a) is a resistance knob (b) makes things spin (c) glows using little power (d) smooths a wobbly supply
  36. 36.True or false: a thermistor beeps for an alarm. (a) True (b) False
  37. 37.True or false: a potentiometer lets current go one way. (a) True (b) False
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.What does a buzzer do? (a) is a resistance knob (b) beeps for an alarm (c) limits the current (d) lets current go one way
  40. 40.🧩 Which component limits the current? (a) thermistor (b) resistor (c) buzzer (d) motor

Answer key

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

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