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Electronics Worksheet: Electronic Components

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

Answer key

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

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