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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 281 · 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 capacitor glows using little power. (a) False (b) True
  2. 2.🧩 Which component blows if current is high? (a) capacitor (b) potentiometer (c) fuse (d) resistor
  3. 3.🧩 Which component glows using little power? (a) fuse (b) resistor (c) transistor (d) LED
  4. 4.🧩 Which component boosts a small signal? (a) transistor (b) resistor (c) potentiometer (d) motor
  5. 5.True or false: a transistor boosts a small signal. (a) True (b) False
  6. 6.What does an LDR do? (a) makes a beeping sound (b) stores a little charge (c) senses how bright it is (d) limits the current
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  8. 8.True or false: a potentiometer limits the current. (a) False (b) True
  9. 9.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  10. 10.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  11. 11.🧩 Which component has coloured bands? (a) LDR (b) LED (c) resistor (d) transistor
  12. 12.What does a resistor do? (a) is a resistance knob (b) beeps for an alarm (c) blows if current is high (d) limits the current
  13. 13.True or false: a buzzer beeps for an alarm. (a) True (b) False
  14. 14.🧩 Which component limits the current? (a) capacitor (b) potentiometer (c) resistor (d) LED
  15. 15.True or false: a motor makes things spin. (a) False (b) True
  16. 16.What does a buzzer do? (a) senses how hot it is (b) smooths a wobbly supply (c) beeps for an alarm (d) limits the current
  17. 17.What does a motor do? (a) limits the current (b) senses how hot it is (c) makes things spin (d) beeps for an alarm
  18. 18.🧩 Which component turns a fan or wheels? (a) LED (b) potentiometer (c) motor (d) resistor
  19. 19.True or false: a resistor senses how bright it is. (a) False (b) True
  20. 20.True or false: a transistor makes a beeping sound. (a) True (b) False
  21. 21.True or false: a transistor senses how hot it is. (a) True (b) False
  22. 22.True or false: an LED blows if current is high. (a) True (b) False
  23. 23.🧩 Which component makes a beeping sound? (a) LED (b) diode (c) buzzer (d) motor
  24. 24.What does a potentiometer do? (a) is a resistance knob (b) glows using little power (c) makes a beeping sound (d) turns a fan or wheels
  25. 25.🧩 Which component is a resistance knob? (a) capacitor (b) LED (c) resistor (d) potentiometer
  26. 26.True or false: a buzzer makes a beeping sound. (a) True (b) False
  27. 27.🧩 Which component beeps for an alarm? (a) buzzer (b) capacitor (c) fuse (d) potentiometer
  28. 28.🧩 Which component stores a little charge? (a) diode (b) LDR (c) capacitor (d) resistor
  29. 29.What does an LED do? (a) has coloured bands (b) smooths a wobbly supply (c) glows using little power (d) senses how bright it is
  30. 30.True or false: an LED stores a little charge. (a) True (b) False
  31. 31.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) fuse (d) motor
  32. 32.What does a transistor do? (a) stores a little charge (b) blows if current is high (c) beeps for an alarm (d) boosts a small signal
  33. 33.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) transistor (d) motor
  34. 34.What does a resistor do? (a) lets current go one way (b) has coloured bands (c) makes things spin (d) stores a little charge
  35. 35.True or false: a fuse turns a fan or wheels. (a) False (b) True
  36. 36.True or false: a resistor lets current go one way. (a) True (b) False
  37. 37.What does a motor do? (a) senses how hot it is (b) smooths a wobbly supply (c) stores a little charge (d) turns a fan or wheels
  38. 38.True or false: a diode lets current go one way. (a) True (b) False
  39. 39.True or false: a resistor senses how hot it is. (a) False (b) True
  40. 40.True or false: a capacitor smooths a wobbly supply. (a) True (b) False

Answer key

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

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