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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 674 · 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) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  2. 2.True or false: a potentiometer limits the current. (a) True (b) False
  3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  5. 5.What does a potentiometer do? (a) stores a little charge (b) is a resistance knob (c) smooths a wobbly supply (d) senses how bright it is
  6. 6.What does a diode do? (a) stores a little charge (b) beeps for an alarm (c) smooths a wobbly supply (d) lets current go one way
  7. 7.What does a thermistor do? (a) has coloured bands (b) senses how hot it is (c) boosts a small signal (d) lets current go one way
  8. 8.True or false: a diode lets current go one way. (a) False (b) True
  9. 9.True or false: a transistor boosts a small signal. (a) False (b) True
  10. 10.True or false: a buzzer makes a beeping sound. (a) False (b) True
  11. 11.True or false: an LED glows using little power. (a) False (b) True
  12. 12.🧩 Which component limits the current? (a) resistor (b) fuse (c) potentiometer (d) transistor
  13. 13.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  14. 14.What does a transistor do? (a) senses how bright it is (b) blows if current is high (c) boosts a small signal (d) beeps for an alarm
  15. 15.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) capacitor (d) LDR
  16. 16.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) fuse (c) transistor (d) capacitor
  17. 17.What does a resistor do? (a) limits the current (b) makes a beeping sound (c) turns a fan or wheels (d) stores a little charge
  18. 18.True or false: a resistor makes things spin. (a) True (b) False
  19. 19.True or false: a resistor boosts a small signal. (a) False (b) True
  20. 20.What does an LED do? (a) makes a beeping sound (b) boosts a small signal (c) limits the current (d) glows using little power
  21. 21.True or false: a motor makes things spin. (a) True (b) False
  22. 22.True or false: a diode turns a fan or wheels. (a) False (b) True
  23. 23.🧩 Which component has coloured bands? (a) diode (b) LED (c) resistor (d) potentiometer
  24. 24.True or false: a capacitor stores a little charge. (a) True (b) False
  25. 25.🧩 Which component turns a fan or wheels? (a) LED (b) resistor (c) LDR (d) motor
  26. 26.What does a fuse do? (a) makes a beeping sound (b) makes things spin (c) turns a fan or wheels (d) blows if current is high
  27. 27.What does a buzzer do? (a) senses how hot it is (b) has coloured bands (c) blows if current is high (d) beeps for an alarm
  28. 28.🧩 Which component boosts a small signal? (a) potentiometer (b) transistor (c) capacitor (d) LED
  29. 29.True or false: an LED is a resistance knob. (a) False (b) True
  30. 30.🧩 Which component makes things spin? (a) potentiometer (b) buzzer (c) transistor (d) motor
  31. 31.True or false: an LED stores a little charge. (a) True (b) False
  32. 32.True or false: a diode senses how bright it is. (a) False (b) True
  33. 33.True or false: a resistor makes a beeping sound. (a) False (b) True
  34. 34.What does an LDR do? (a) makes a beeping sound (b) senses how hot it is (c) boosts a small signal (d) senses how bright it is
  35. 35.True or false: a resistor lets current go one way. (a) True (b) False
  36. 36.🧩 Which component senses how hot it is? (a) thermistor (b) LED (c) capacitor (d) motor
  37. 37.🧩 Which component beeps for an alarm? (a) capacitor (b) LDR (c) buzzer (d) transistor
  38. 38.🧩 Which component blows if current is high? (a) motor (b) thermistor (c) LED (d) fuse
  39. 39.True or false: a capacitor makes things spin. (a) False (b) True
  40. 40.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) fuse (d) resistor

Answer key

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

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