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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 628 · 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) an LED (b) a resistor (c) a fuse (d) a motor
  2. 2.🧩 Which component makes things spin? (a) motor (b) diode (c) capacitor (d) resistor
  3. 3.What does a potentiometer do? (a) senses how hot it is (b) limits the current (c) makes a beeping sound (d) is a resistance knob
  4. 4.🧩 Which component has coloured bands? (a) buzzer (b) diode (c) potentiometer (d) resistor
  5. 5.True or false: a transistor lets current go one way. (a) True (b) False
  6. 6.What does a buzzer do? (a) lets current go one way (b) blows if current is high (c) turns a fan or wheels (d) beeps for an alarm
  7. 7.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) thermistor (d) LED
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  9. 9.True or false: a capacitor stores a little charge. (a) True (b) False
  10. 10.What does an LDR do? (a) makes things spin (b) makes a beeping sound (c) stores a little charge (d) senses how bright it is
  11. 11.True or false: an LED beeps for an alarm. (a) False (b) True
  12. 12.What does an LED do? (a) glows using little power (b) boosts a small signal (c) senses how hot it is (d) beeps for an alarm
  13. 13.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  14. 14.True or false: an LED boosts a small signal. (a) True (b) False
  15. 15.🧩 Which component makes a beeping sound? (a) buzzer (b) LDR (c) motor (d) resistor
  16. 16.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) smooths a wobbly supply (d) beeps for an alarm
  17. 17.True or false: a fuse beeps for an alarm. (a) False (b) True
  18. 18.🧩 Which component lets current go one way? (a) transistor (b) LED (c) diode (d) buzzer
  19. 19.True or false: a potentiometer is a resistance knob. (a) True (b) False
  20. 20.What does a motor do? (a) stores a little charge (b) glows using little power (c) makes things spin (d) smooths a wobbly supply
  21. 21.🧩 Which component limits the current? (a) fuse (b) diode (c) motor (d) resistor
  22. 22.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  23. 23.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) transistor (d) motor
  24. 24.True or false: a buzzer boosts a small signal. (a) True (b) False
  25. 25.True or false: a buzzer beeps for an alarm. (a) False (b) True
  26. 26.What does a transistor do? (a) blows if current is high (b) has coloured bands (c) limits the current (d) boosts a small signal
  27. 27.What does a capacitor do? (a) beeps for an alarm (b) senses how bright it is (c) is a resistance knob (d) smooths a wobbly supply
  28. 28.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) fuse (d) thermistor
  29. 29.What does a motor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) is a resistance knob (d) makes a beeping sound
  30. 30.🧩 Which component glows using little power? (a) LED (b) capacitor (c) motor (d) fuse
  31. 31.True or false: a capacitor beeps for an alarm. (a) True (b) False
  32. 32.True or false: a buzzer makes a beeping sound. (a) False (b) True
  33. 33.True or false: a capacitor lets current go one way. (a) False (b) True
  34. 34.True or false: a fuse blows if current is high. (a) False (b) True
  35. 35.What does a thermistor do? (a) senses how hot it is (b) boosts a small signal (c) stores a little charge (d) is a resistance knob
  36. 36.True or false: a motor glows using little power. (a) False (b) True
  37. 37.True or false: an LED smooths a wobbly supply. (a) True (b) False
  38. 38.True or false: a resistor blows if current is high. (a) True (b) False
  39. 39.🧩 Which component smooths a wobbly supply? (a) diode (b) resistor (c) capacitor (d) potentiometer
  40. 40.True or false: an LED stores a little charge. (a) False (b) True

Answer key

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

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