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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 532 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  2. 2.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) potentiometer (d) motor
  3. 3.🧩 Which component boosts a small signal? (a) resistor (b) diode (c) fuse (d) transistor
  4. 4.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) LDR (d) motor
  5. 5.🧩 Which component glows using little power? (a) diode (b) LED (c) fuse (d) buzzer
  6. 6.What does a transistor do? (a) limits the current (b) blows if current is high (c) smooths a wobbly supply (d) boosts a small signal
  7. 7.True or false: a transistor blows if current is high. (a) True (b) False
  8. 8.🧩 Which component senses how bright it is? (a) resistor (b) LDR (c) buzzer (d) capacitor
  9. 9.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  11. 11.🧩 Which component limits the current? (a) resistor (b) motor (c) diode (d) fuse
  12. 12.What does a motor do? (a) boosts a small signal (b) is a resistance knob (c) makes a beeping sound (d) makes things spin
  13. 13.What does a capacitor do? (a) is a resistance knob (b) stores a little charge (c) has coloured bands (d) senses how hot it is
  14. 14.What does a resistor do? (a) has coloured bands (b) makes a beeping sound (c) makes things spin (d) boosts a small signal
  15. 15.🧩 Which component senses how hot it is? (a) thermistor (b) LDR (c) potentiometer (d) LED
  16. 16.🧩 Which component is a resistance knob? (a) capacitor (b) LED (c) diode (d) potentiometer
  17. 17.True or false: a buzzer boosts a small signal. (a) False (b) True
  18. 18.True or false: an LED stores a little charge. (a) False (b) True
  19. 19.What does a buzzer do? (a) stores a little charge (b) smooths a wobbly supply (c) makes a beeping sound (d) is a resistance knob
  20. 20.True or false: a resistor limits the current. (a) True (b) False
  21. 21.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  22. 22.True or false: a fuse senses how bright it is. (a) False (b) True
  23. 23.What does a diode do? (a) makes a beeping sound (b) boosts a small signal (c) lets current go one way (d) limits the current
  24. 24.True or false: a fuse blows if current is high. (a) True (b) False
  25. 25.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  26. 26.True or false: a diode beeps for an alarm. (a) False (b) True
  27. 27.What does a capacitor do? (a) glows using little power (b) has coloured bands (c) smooths a wobbly supply (d) turns a fan or wheels
  28. 28.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) has coloured bands (d) smooths a wobbly supply
  29. 29.🧩 Which component beeps for an alarm? (a) LED (b) fuse (c) buzzer (d) transistor
  30. 30.🧩 Which component makes a beeping sound? (a) thermistor (b) LDR (c) diode (d) buzzer
  31. 31.What does a thermistor do? (a) has coloured bands (b) beeps for an alarm (c) senses how bright it is (d) senses how hot it is
  32. 32.True or false: a buzzer makes a beeping sound. (a) False (b) True
  33. 33.True or false: a motor smooths a wobbly supply. (a) True (b) False
  34. 34.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) LDR (d) transistor
  35. 35.True or false: a capacitor has coloured bands. (a) True (b) False
  36. 36.What does an LED do? (a) limits the current (b) lets current go one way (c) beeps for an alarm (d) glows using little power
  37. 37.True or false: a resistor has coloured bands. (a) True (b) False
  38. 38.What does a resistor do? (a) glows using little power (b) limits the current (c) makes a beeping sound (d) turns a fan or wheels
  39. 39.🧩 Which component lets current go one way? (a) resistor (b) motor (c) fuse (d) diode
  40. 40.True or false: an LDR stores a little charge. (a) True (b) False

Answer key

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

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