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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 533 · 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 part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  2. 2.What does a diode do? (a) glows using little power (b) beeps for an alarm (c) lets current go one way (d) senses how bright it is
  3. 3.True or false: a capacitor stores a little charge. (a) True (b) False
  4. 4.🧩 Which component lets current go one way? (a) LDR (b) fuse (c) LED (d) diode
  5. 5.True or false: a buzzer makes a beeping sound. (a) False (b) True
  6. 6.🧩 Which component limits the current? (a) potentiometer (b) LDR (c) thermistor (d) resistor
  7. 7.What does an LED do? (a) senses how hot it is (b) turns a fan or wheels (c) smooths a wobbly supply (d) glows using little power
  8. 8.True or false: a motor makes things spin. (a) False (b) True
  9. 9.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  10. 10.🧩 Which component makes a beeping sound? (a) resistor (b) diode (c) buzzer (d) LED
  11. 11.🧩 Which component beeps for an alarm? (a) resistor (b) capacitor (c) potentiometer (d) buzzer
  12. 12.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  13. 13.True or false: a buzzer senses how hot it is. (a) True (b) False
  14. 14.🧩 Which component boosts a small signal? (a) LED (b) motor (c) thermistor (d) transistor
  15. 15.🧩 Which component turns a fan or wheels? (a) buzzer (b) resistor (c) thermistor (d) motor
  16. 16.What does a thermistor do? (a) beeps for an alarm (b) has coloured bands (c) limits the current (d) senses how hot it is
  17. 17.True or false: a potentiometer senses how hot it is. (a) False (b) True
  18. 18.True or false: a thermistor stores a little charge. (a) True (b) False
  19. 19.True or false: a fuse blows if current is high. (a) False (b) True
  20. 20.🧩 Which component senses how hot it is? (a) resistor (b) LED (c) thermistor (d) potentiometer
  21. 21.What does a resistor do? (a) lets current go one way (b) has coloured bands (c) makes things spin (d) turns a fan or wheels
  22. 22.🧩 Which component senses how bright it is? (a) LDR (b) fuse (c) diode (d) motor
  23. 23.True or false: a transistor boosts a small signal. (a) True (b) False
  24. 24.True or false: a motor blows if current is high. (a) True (b) False
  25. 25.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) fuse (d) motor
  26. 26.🧩 Which component makes things spin? (a) LDR (b) potentiometer (c) motor (d) diode
  27. 27.What does an LDR do? (a) smooths a wobbly supply (b) makes a beeping sound (c) blows if current is high (d) senses how bright it is
  28. 28.True or false: an LDR senses how bright it is. (a) False (b) True
  29. 29.True or false: a capacitor blows if current is high. (a) False (b) True
  30. 30.True or false: a thermistor boosts a small signal. (a) False (b) True
  31. 31.True or false: a fuse stores a little charge. (a) True (b) False
  32. 32.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) transistor (d) diode
  33. 33.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) buzzer (d) potentiometer
  34. 34.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) lets current go one way (d) glows using little power
  35. 35.What does a resistor do? (a) boosts a small signal (b) glows using little power (c) limits the current (d) senses how hot it is
  36. 36.True or false: a resistor makes a beeping sound. (a) True (b) False
  37. 37.What does a motor do? (a) is a resistance knob (b) glows using little power (c) smooths a wobbly supply (d) turns a fan or wheels
  38. 38.True or false: a diode makes a beeping sound. (a) True (b) False
  39. 39.True or false: a resistor limits the current. (a) False (b) True
  40. 40.What does a motor do? (a) senses how bright it is (b) glows using little power (c) makes things spin (d) limits the current

Answer key

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

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