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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 215 · 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 makes a beeping sound? (a) resistor (b) buzzer (c) LED (d) transistor
  2. 2.True or false: a potentiometer makes a beeping sound. (a) False (b) True
  3. 3.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  4. 4.🧩 Which component lets current go one way? (a) thermistor (b) buzzer (c) diode (d) resistor
  5. 5.True or false: a fuse senses how bright it is. (a) False (b) True
  6. 6.🧩 Which component has coloured bands? (a) thermistor (b) fuse (c) resistor (d) LDR
  7. 7.True or false: a capacitor stores a little charge. (a) True (b) False
  8. 8.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  9. 9.True or false: a diode makes a beeping sound. (a) True (b) False
  10. 10.What does a thermistor do? (a) senses how hot it is (b) turns a fan or wheels (c) smooths a wobbly supply (d) stores a little charge
  11. 11.What does an LED do? (a) glows using little power (b) senses how bright it is (c) beeps for an alarm (d) makes things spin
  12. 12.🧩 Which component stores a little charge? (a) diode (b) buzzer (c) capacitor (d) motor
  13. 13.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) LDR (d) potentiometer
  14. 14.True or false: a transistor boosts a small signal. (a) False (b) True
  15. 15.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) buzzer (d) thermistor
  16. 16.True or false: a fuse has coloured bands. (a) True (b) False
  17. 17.🧩 Which component smooths a wobbly supply? (a) LDR (b) motor (c) capacitor (d) thermistor
  18. 18.What does a capacitor do? (a) turns a fan or wheels (b) senses how bright it is (c) stores a little charge (d) senses how hot it is
  19. 19.True or false: an LDR senses how bright it is. (a) True (b) False
  20. 20.What does a fuse do? (a) senses how hot it is (b) stores a little charge (c) makes a beeping sound (d) blows if current is high
  21. 21.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  22. 22.True or false: a resistor makes a beeping sound. (a) False (b) True
  23. 23.True or false: a transistor turns a fan or wheels. (a) False (b) True
  24. 24.True or false: a diode makes things spin. (a) False (b) True
  25. 25.What does a buzzer do? (a) smooths a wobbly supply (b) senses how bright it is (c) beeps for an alarm (d) has coloured bands
  26. 26.What does a potentiometer do? (a) makes a beeping sound (b) stores a little charge (c) has coloured bands (d) is a resistance knob
  27. 27.True or false: a capacitor beeps for an alarm. (a) True (b) False
  28. 28.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  29. 29.True or false: a buzzer has coloured bands. (a) False (b) True
  30. 30.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  31. 31.What does a transistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) boosts a small signal (d) senses how bright it is
  32. 32.True or false: a thermistor glows using little power. (a) False (b) True
  33. 33.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) LED (d) capacitor
  34. 34.🧩 Which component senses how bright it is? (a) fuse (b) diode (c) LDR (d) resistor
  35. 35.What does an LDR do? (a) makes a beeping sound (b) senses how bright it is (c) beeps for an alarm (d) is a resistance knob
  36. 36.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) thermistor (d) potentiometer
  37. 37.True or false: a buzzer beeps for an alarm. (a) False (b) True
  38. 38.True or false: a resistor boosts a small signal. (a) False (b) True
  39. 39.True or false: a motor turns a fan or wheels. (a) False (b) True
  40. 40.True or false: a resistor has coloured bands. (a) True (b) False

Answer key

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

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