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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 637 · 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 diode beeps for an alarm. (a) True (b) False
  2. 2.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  4. 4.True or false: an LED glows using little power. (a) False (b) True
  5. 5.True or false: an LDR senses how hot it is. (a) False (b) True
  6. 6.True or false: a resistor makes a beeping sound. (a) False (b) True
  7. 7.🧩 Which component stores a little charge? (a) resistor (b) capacitor (c) LDR (d) fuse
  8. 8.True or false: a motor has coloured bands. (a) False (b) True
  9. 9.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  10. 10.True or false: an LED makes a beeping sound. (a) False (b) True
  11. 11.What does a capacitor do? (a) stores a little charge (b) senses how hot it is (c) is a resistance knob (d) has coloured bands
  12. 12.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  13. 13.🧩 Which component glows using little power? (a) LED (b) potentiometer (c) resistor (d) motor
  14. 14.What does a motor do? (a) stores a little charge (b) limits the current (c) boosts a small signal (d) makes things spin
  15. 15.True or false: a diode is a resistance knob. (a) False (b) True
  16. 16.🧩 Which component lets current go one way? (a) LDR (b) diode (c) fuse (d) thermistor
  17. 17.🧩 Which component boosts a small signal? (a) capacitor (b) resistor (c) transistor (d) LDR
  18. 18.True or false: a buzzer is a resistance knob. (a) False (b) True
  19. 19.True or false: a resistor limits the current. (a) False (b) True
  20. 20.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  21. 21.True or false: a buzzer makes a beeping sound. (a) True (b) False
  22. 22.What does a diode do? (a) lets current go one way (b) stores a little charge (c) senses how hot it is (d) senses how bright it is
  23. 23.🧩 Which component blows if current is high? (a) buzzer (b) LED (c) fuse (d) resistor
  24. 24.What does a transistor do? (a) senses how bright it is (b) lets current go one way (c) limits the current (d) boosts a small signal
  25. 25.What does a capacitor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) makes a beeping sound (d) turns a fan or wheels
  26. 26.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) thermistor (d) resistor
  27. 27.True or false: a resistor lets current go one way. (a) True (b) False
  28. 28.True or false: a motor turns a fan or wheels. (a) True (b) False
  29. 29.True or false: an LDR lets current go one way. (a) True (b) False
  30. 30.🧩 Which component has coloured bands? (a) resistor (b) motor (c) capacitor (d) diode
  31. 31.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  32. 32.What does a potentiometer do? (a) senses how hot it is (b) makes things spin (c) makes a beeping sound (d) is a resistance knob
  33. 33.🧩 Which component smooths a wobbly supply? (a) thermistor (b) motor (c) diode (d) capacitor
  34. 34.What does a fuse do? (a) smooths a wobbly supply (b) senses how bright it is (c) blows if current is high (d) is a resistance knob
  35. 35.What does an LED do? (a) glows using little power (b) lets current go one way (c) boosts a small signal (d) makes a beeping sound
  36. 36.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  37. 37.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a thermistor is a resistance knob. (a) True (b) False
  39. 39.🧩 Which component senses how hot it is? (a) resistor (b) motor (c) thermistor (d) transistor
  40. 40.What does a resistor do? (a) senses how hot it is (b) turns a fan or wheels (c) limits the current (d) makes things spin

Answer key

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

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