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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 579 · 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 motor (c) a fuse (d) a resistor
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
  3. 3.True or false: an LED limits the current. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  5. 5.🧩 Which component limits the current? (a) resistor (b) LED (c) potentiometer (d) fuse
  6. 6.What does a potentiometer do? (a) limits the current (b) has coloured bands (c) senses how bright it is (d) is a resistance knob
  7. 7.🧩 Which component boosts a small signal? (a) fuse (b) resistor (c) potentiometer (d) transistor
  8. 8.🧩 Which component has coloured bands? (a) resistor (b) potentiometer (c) motor (d) LED
  9. 9.What does a capacitor do? (a) lets current go one way (b) blows if current is high (c) is a resistance knob (d) smooths a wobbly supply
  10. 10.🧩 Which component senses how bright it is? (a) capacitor (b) potentiometer (c) resistor (d) LDR
  11. 11.🧩 Which component makes things spin? (a) resistor (b) motor (c) potentiometer (d) capacitor
  12. 12.True or false: a motor makes things spin. (a) False (b) True
  13. 13.What does a resistor do? (a) stores a little charge (b) makes things spin (c) senses how hot it is (d) has coloured bands
  14. 14.True or false: a capacitor senses how bright it is. (a) False (b) True
  15. 15.🧩 Which component glows using little power? (a) capacitor (b) fuse (c) transistor (d) LED
  16. 16.True or false: a buzzer beeps for an alarm. (a) False (b) True
  17. 17.🧩 Which component blows if current is high? (a) fuse (b) thermistor (c) buzzer (d) resistor
  18. 18.🧩 Which component smooths a wobbly supply? (a) LDR (b) motor (c) resistor (d) capacitor
  19. 19.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) LDR (d) thermistor
  20. 20.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) stores a little charge (d) senses how hot it is
  21. 21.What does a motor do? (a) senses how hot it is (b) smooths a wobbly supply (c) stores a little charge (d) makes things spin
  22. 22.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  23. 23.What does a thermistor do? (a) makes things spin (b) smooths a wobbly supply (c) senses how hot it is (d) glows using little power
  24. 24.What does an LDR do? (a) has coloured bands (b) beeps for an alarm (c) makes things spin (d) senses how bright it is
  25. 25.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) motor (d) buzzer
  26. 26.What does a diode do? (a) lets current go one way (b) glows using little power (c) blows if current is high (d) smooths a wobbly supply
  27. 27.🧩 Which component makes a beeping sound? (a) capacitor (b) motor (c) diode (d) buzzer
  28. 28.True or false: a diode has coloured bands. (a) True (b) False
  29. 29.True or false: a resistor stores a little charge. (a) False (b) True
  30. 30.True or false: an LED senses how hot it is. (a) True (b) False
  31. 31.True or false: a diode boosts a small signal. (a) False (b) True
  32. 32.True or false: a resistor has coloured bands. (a) True (b) False
  33. 33.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) LED (d) fuse
  34. 34.True or false: a transistor lets current go one way. (a) False (b) True
  35. 35.True or false: a thermistor senses how hot it is. (a) False (b) True
  36. 36.True or false: a resistor limits the current. (a) True (b) False
  37. 37.True or false: a transistor glows using little power. (a) False (b) True
  38. 38.True or false: a motor glows using little power. (a) True (b) False
  39. 39.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) senses how hot it is (d) lets current go one way
  40. 40.True or false: a motor smooths a wobbly supply. (a) True (b) False

Answer key

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

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