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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 501 · 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) spin a wheel (c) measure heat (d) store charge briefly
  2. 2.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) lets current go one way (d) senses how hot it is
  3. 3.True or false: an LED has coloured bands. (a) False (b) True
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  5. 5.True or false: a motor senses how hot it is. (a) True (b) False
  6. 6.What does a buzzer do? (a) senses how hot it is (b) beeps for an alarm (c) is a resistance knob (d) turns a fan or wheels
  7. 7.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) is a resistance knob (d) glows using little power
  8. 8.True or false: a potentiometer is a resistance knob. (a) False (b) True
  9. 9.True or false: an LED blows if current is high. (a) True (b) False
  10. 10.What does a transistor do? (a) boosts a small signal (b) makes a beeping sound (c) is a resistance knob (d) limits the current
  11. 11.What does a fuse do? (a) makes a beeping sound (b) blows if current is high (c) senses how hot it is (d) glows using little power
  12. 12.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) thermistor (d) potentiometer
  13. 13.True or false: a resistor limits the current. (a) True (b) False
  14. 14.🧩 Which component makes things spin? (a) LED (b) motor (c) LDR (d) transistor
  15. 15.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) diode (d) LED
  16. 16.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  17. 17.🧩 Which component senses how bright it is? (a) LDR (b) resistor (c) fuse (d) motor
  18. 18.True or false: a transistor turns a fan or wheels. (a) False (b) True
  19. 19.What does a buzzer do? (a) is a resistance knob (b) boosts a small signal (c) makes things spin (d) makes a beeping sound
  20. 20.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  21. 21.🧩 Which component glows using little power? (a) transistor (b) LED (c) thermistor (d) resistor
  22. 22.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) senses how bright it is (d) has coloured bands
  23. 23.What does a potentiometer do? (a) senses how hot it is (b) beeps for an alarm (c) is a resistance knob (d) senses how bright it is
  24. 24.True or false: a motor is a resistance knob. (a) True (b) False
  25. 25.What does a motor do? (a) turns a fan or wheels (b) lets current go one way (c) glows using little power (d) senses how bright it is
  26. 26.True or false: a buzzer lets current go one way. (a) True (b) False
  27. 27.True or false: a thermistor blows if current is high. (a) False (b) True
  28. 28.🧩 Which component stores a little charge? (a) resistor (b) LED (c) transistor (d) capacitor
  29. 29.True or false: a transistor beeps for an alarm. (a) False (b) True
  30. 30.🧩 Which component senses how hot it is? (a) potentiometer (b) fuse (c) thermistor (d) capacitor
  31. 31.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) resistor (d) LDR
  32. 32.🧩 Which component lets current go one way? (a) fuse (b) diode (c) buzzer (d) capacitor
  33. 33.🧩 Which component boosts a small signal? (a) thermistor (b) LDR (c) capacitor (d) transistor
  34. 34.🧩 Which component smooths a wobbly supply? (a) resistor (b) fuse (c) transistor (d) capacitor
  35. 35.What does a resistor do? (a) boosts a small signal (b) beeps for an alarm (c) senses how bright it is (d) limits the current
  36. 36.True or false: a capacitor stores a little charge. (a) True (b) False
  37. 37.True or false: a diode smooths a wobbly supply. (a) False (b) True
  38. 38.True or false: a fuse lets current go one way. (a) True (b) False
  39. 39.What does a capacitor do? (a) smooths a wobbly supply (b) lets current go one way (c) senses how bright it is (d) senses how hot it is
  40. 40.True or false: a motor turns a fan or wheels. (a) False (b) True

Answer key

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

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