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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 540 · 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 resistor (b) a motor (c) an LED (d) a fuse
  2. 2.True or false: an LDR senses how bright it is. (a) True (b) False
  3. 3.🧩 Which component stores a little charge? (a) motor (b) LDR (c) buzzer (d) capacitor
  4. 4.True or false: a potentiometer is a resistance knob. (a) True (b) False
  5. 5.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) resistor (d) diode
  6. 6.True or false: a motor makes things spin. (a) True (b) False
  7. 7.What does a diode do? (a) lets current go one way (b) has coloured bands (c) boosts a small signal (d) turns a fan or wheels
  8. 8.True or false: a resistor is a resistance knob. (a) True (b) False
  9. 9.True or false: a capacitor senses how bright it is. (a) True (b) False
  10. 10.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) beeps for an alarm (d) lets current go one way
  11. 11.🧩 Which component beeps for an alarm? (a) thermistor (b) fuse (c) LED (d) buzzer
  12. 12.🧩 Which component boosts a small signal? (a) LED (b) fuse (c) transistor (d) thermistor
  13. 13.🧩 Which component makes things spin? (a) buzzer (b) LED (c) motor (d) resistor
  14. 14.What does a transistor do? (a) senses how hot it is (b) has coloured bands (c) turns a fan or wheels (d) boosts a small signal
  15. 15.🧩 Which component makes a beeping sound? (a) transistor (b) capacitor (c) buzzer (d) motor
  16. 16.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  17. 17.True or false: a thermistor is a resistance knob. (a) True (b) False
  18. 18.🧩 Which component has coloured bands? (a) capacitor (b) potentiometer (c) LED (d) resistor
  19. 19.🧩 Which component turns a fan or wheels? (a) motor (b) LED (c) transistor (d) thermistor
  20. 20.True or false: a resistor makes a beeping sound. (a) False (b) True
  21. 21.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  22. 22.True or false: a capacitor limits the current. (a) False (b) True
  23. 23.What does a motor do? (a) senses how bright it is (b) makes a beeping sound (c) senses how hot it is (d) turns a fan or wheels
  24. 24.What does a motor do? (a) makes things spin (b) limits the current (c) stores a little charge (d) has coloured bands
  25. 25.True or false: an LED stores a little charge. (a) False (b) True
  26. 26.🧩 Which component senses how bright it is? (a) resistor (b) buzzer (c) thermistor (d) LDR
  27. 27.True or false: a potentiometer lets current go one way. (a) False (b) True
  28. 28.🧩 Which component lets current go one way? (a) transistor (b) thermistor (c) motor (d) diode
  29. 29.True or false: a capacitor lets current go one way. (a) True (b) False
  30. 30.True or false: an LDR glows using little power. (a) True (b) False
  31. 31.True or false: an LED blows if current is high. (a) False (b) True
  32. 32.What does an LED do? (a) has coloured bands (b) stores a little charge (c) glows using little power (d) turns a fan or wheels
  33. 33.True or false: a diode lets current go one way. (a) False (b) True
  34. 34.True or false: a fuse blows if current is high. (a) True (b) False
  35. 35.True or false: a diode has coloured bands. (a) True (b) False
  36. 36.What does an LDR do? (a) senses how bright it is (b) beeps for an alarm (c) limits the current (d) glows using little power
  37. 37.🧩 Which component glows using little power? (a) LED (b) fuse (c) thermistor (d) transistor
  38. 38.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) LDR (d) motor
  39. 39.🧩 Which component limits the current? (a) capacitor (b) fuse (c) motor (d) resistor
  40. 40.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) transistor (c) capacitor (d) buzzer

Answer key

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

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