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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 248 · 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) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  2. 2.What does a capacitor do? (a) smooths a wobbly supply (b) lets current go one way (c) makes things spin (d) limits the current
  3. 3.What does a buzzer do? (a) limits the current (b) has coloured bands (c) beeps for an alarm (d) stores a little charge
  4. 4.What does a resistor do? (a) glows using little power (b) boosts a small signal (c) limits the current (d) blows if current is high
  5. 5.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) capacitor (d) fuse
  6. 6.🧩 Which component senses how bright it is? (a) resistor (b) LDR (c) diode (d) LED
  7. 7.What does a resistor do? (a) turns a fan or wheels (b) makes things spin (c) makes a beeping sound (d) has coloured bands
  8. 8.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) potentiometer (d) transistor
  9. 9.What does an LED do? (a) makes things spin (b) makes a beeping sound (c) lets current go one way (d) glows using little power
  10. 10.True or false: a motor makes things spin. (a) True (b) False
  11. 11.True or false: a potentiometer has coloured bands. (a) True (b) False
  12. 12.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) thermistor (d) LDR
  13. 13.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
  14. 14.What does a potentiometer do? (a) lets current go one way (b) beeps for an alarm (c) makes things spin (d) is a resistance knob
  15. 15.True or false: a buzzer makes a beeping sound. (a) True (b) False
  16. 16.What does a buzzer do? (a) senses how bright it is (b) boosts a small signal (c) makes a beeping sound (d) limits the current
  17. 17.🧩 Which component blows if current is high? (a) LDR (b) motor (c) capacitor (d) fuse
  18. 18.True or false: a diode turns a fan or wheels. (a) False (b) True
  19. 19.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  20. 20.True or false: a motor blows if current is high. (a) True (b) False
  21. 21.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) limits the current (d) boosts a small signal
  22. 22.🧩 Which component lets current go one way? (a) LED (b) buzzer (c) diode (d) resistor
  23. 23.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  24. 24.What does a diode do? (a) makes a beeping sound (b) stores a little charge (c) turns a fan or wheels (d) lets current go one way
  25. 25.What does a thermistor do? (a) glows using little power (b) senses how bright it is (c) senses how hot it is (d) limits the current
  26. 26.What does a transistor do? (a) boosts a small signal (b) makes a beeping sound (c) beeps for an alarm (d) is a resistance knob
  27. 27.🧩 Which component limits the current? (a) resistor (b) fuse (c) motor (d) diode
  28. 28.True or false: a buzzer senses how bright it is. (a) True (b) False
  29. 29.🧩 Which component makes things spin? (a) LED (b) resistor (c) motor (d) buzzer
  30. 30.What does a fuse do? (a) limits the current (b) senses how bright it is (c) blows if current is high (d) makes a beeping sound
  31. 31.True or false: a diode makes things spin. (a) False (b) True
  32. 32.True or false: a transistor blows if current is high. (a) False (b) True
  33. 33.True or false: an LDR senses how bright it is. (a) True (b) False
  34. 34.True or false: a fuse glows using little power. (a) True (b) False
  35. 35.🧩 Which component glows using little power? (a) buzzer (b) LDR (c) motor (d) LED
  36. 36.True or false: a resistor limits the current. (a) False (b) True
  37. 37.True or false: a potentiometer is a resistance knob. (a) False (b) True
  38. 38.True or false: a potentiometer stores a little charge. (a) True (b) False
  39. 39.🧩 Which component boosts a small signal? (a) motor (b) capacitor (c) resistor (d) transistor
  40. 40.🧩 Which component beeps for an alarm? (a) buzzer (b) thermistor (c) LDR (d) potentiometer

Answer key

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

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