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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 196 · 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 smooths a wobbly supply? (a) buzzer (b) resistor (c) transistor (d) capacitor
  2. 2.True or false: a transistor boosts a small signal. (a) True (b) False
  3. 3.True or false: a resistor has coloured bands. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  5. 5.True or false: an LDR senses how bright it is. (a) False (b) True
  6. 6.What does a buzzer do? (a) smooths a wobbly supply (b) senses how hot it is (c) beeps for an alarm (d) stores a little charge
  7. 7.What does a diode do? (a) stores a little charge (b) makes a beeping sound (c) turns a fan or wheels (d) lets current go one way
  8. 8.True or false: a diode lets current go one way. (a) True (b) False
  9. 9.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) potentiometer (d) LDR
  10. 10.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  11. 11.What does an LED do? (a) boosts a small signal (b) glows using little power (c) turns a fan or wheels (d) makes things spin
  12. 12.🧩 Which component beeps for an alarm? (a) thermistor (b) transistor (c) diode (d) buzzer
  13. 13.🧩 Which component has coloured bands? (a) potentiometer (b) capacitor (c) resistor (d) thermistor
  14. 14.What does a capacitor do? (a) smooths a wobbly supply (b) has coloured bands (c) is a resistance knob (d) makes a beeping sound
  15. 15.True or false: an LED glows using little power. (a) False (b) True
  16. 16.True or false: a thermistor has coloured bands. (a) True (b) False
  17. 17.What does a motor do? (a) boosts a small signal (b) has coloured bands (c) turns a fan or wheels (d) limits the current
  18. 18.True or false: a thermistor senses how hot it is. (a) True (b) False
  19. 19.True or false: a resistor limits the current. (a) True (b) False
  20. 20.True or false: a buzzer stores a little charge. (a) False (b) True
  21. 21.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) fuse (d) potentiometer
  22. 22.True or false: a fuse blows if current is high. (a) True (b) False
  23. 23.What does a resistor do? (a) makes a beeping sound (b) beeps for an alarm (c) has coloured bands (d) boosts a small signal
  24. 24.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  25. 25.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  26. 26.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  27. 27.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) buzzer (d) resistor
  28. 28.What does a transistor do? (a) senses how hot it is (b) glows using little power (c) boosts a small signal (d) smooths a wobbly supply
  29. 29.What does a motor do? (a) senses how hot it is (b) smooths a wobbly supply (c) limits the current (d) makes things spin
  30. 30.True or false: a diode senses how bright it is. (a) False (b) True
  31. 31.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  32. 32.What does a capacitor do? (a) senses how bright it is (b) turns a fan or wheels (c) senses how hot it is (d) stores a little charge
  33. 33.True or false: a buzzer senses how bright it is. (a) False (b) True
  34. 34.🧩 Which component glows using little power? (a) resistor (b) thermistor (c) motor (d) LED
  35. 35.🧩 Which component blows if current is high? (a) buzzer (b) resistor (c) fuse (d) LDR
  36. 36.🧩 Which component senses how bright it is? (a) resistor (b) LDR (c) LED (d) potentiometer
  37. 37.🧩 Which component limits the current? (a) transistor (b) potentiometer (c) diode (d) resistor
  38. 38.True or false: a capacitor glows using little power. (a) False (b) True
  39. 39.True or false: a potentiometer is a resistance knob. (a) False (b) True
  40. 40.What does a fuse do? (a) lets current go one way (b) is a resistance knob (c) stores a little charge (d) blows if current is high

Answer key

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

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