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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 349 · 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.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) fuse (d) capacitor
  2. 2.What does a transistor do? (a) stores a little charge (b) boosts a small signal (c) lets current go one way (d) is a resistance knob
  3. 3.What does a thermistor do? (a) blows if current is high (b) makes a beeping sound (c) glows using little power (d) senses how hot it is
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  5. 5.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) capacitor (d) LED
  6. 6.🧩 Which component limits the current? (a) LDR (b) transistor (c) resistor (d) potentiometer
  7. 7.What does a potentiometer do? (a) glows using little power (b) senses how hot it is (c) senses how bright it is (d) is a resistance knob
  8. 8.True or false: a potentiometer is a resistance knob. (a) True (b) False
  9. 9.🧩 Which component lets current go one way? (a) motor (b) fuse (c) diode (d) potentiometer
  10. 10.What does a fuse do? (a) turns a fan or wheels (b) senses how bright it is (c) limits the current (d) blows if current is high
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  12. 12.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  13. 13.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  14. 14.True or false: a capacitor senses how bright it is. (a) True (b) False
  15. 15.🧩 Which component makes things spin? (a) diode (b) motor (c) thermistor (d) fuse
  16. 16.True or false: an LED glows using little power. (a) True (b) False
  17. 17.True or false: an LDR senses how bright it is. (a) True (b) False
  18. 18.True or false: a buzzer boosts a small signal. (a) False (b) True
  19. 19.True or false: a motor turns a fan or wheels. (a) False (b) True
  20. 20.True or false: a resistor turns a fan or wheels. (a) True (b) False
  21. 21.What does a motor do? (a) blows if current is high (b) boosts a small signal (c) turns a fan or wheels (d) stores a little charge
  22. 22.True or false: a thermistor glows using little power. (a) False (b) True
  23. 23.What does a resistor do? (a) stores a little charge (b) smooths a wobbly supply (c) has coloured bands (d) blows if current is high
  24. 24.True or false: an LED boosts a small signal. (a) True (b) False
  25. 25.True or false: a fuse blows if current is high. (a) True (b) False
  26. 26.True or false: a fuse lets current go one way. (a) False (b) True
  27. 27.What does a diode do? (a) turns a fan or wheels (b) stores a little charge (c) lets current go one way (d) senses how hot it is
  28. 28.True or false: a diode lets current go one way. (a) False (b) True
  29. 29.What does an LDR do? (a) senses how bright it is (b) senses how hot it is (c) smooths a wobbly supply (d) stores a little charge
  30. 30.What does a capacitor do? (a) senses how hot it is (b) blows if current is high (c) smooths a wobbly supply (d) lets current go one way
  31. 31.True or false: a capacitor limits the current. (a) False (b) True
  32. 32.What does a resistor do? (a) turns a fan or wheels (b) makes things spin (c) senses how bright it is (d) limits the current
  33. 33.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  34. 34.🧩 Which component makes a beeping sound? (a) fuse (b) thermistor (c) LED (d) buzzer
  35. 35.True or false: a fuse has coloured bands. (a) True (b) False
  36. 36.True or false: a resistor has coloured bands. (a) False (b) True
  37. 37.What does a motor do? (a) boosts a small signal (b) makes a beeping sound (c) smooths a wobbly supply (d) makes things spin
  38. 38.🧩 Which component senses how bright it is? (a) LED (b) thermistor (c) LDR (d) transistor
  39. 39.True or false: a capacitor beeps for an alarm. (a) True (b) False
  40. 40.🧩 Which component stores a little charge? (a) LED (b) motor (c) resistor (d) capacitor

Answer key

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

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