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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 125 · 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 buzzer makes a beeping sound. (a) True (b) False
  2. 2.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) motor (d) potentiometer
  3. 3.True or false: a transistor boosts a small signal. (a) False (b) True
  4. 4.What does a motor do? (a) lets current go one way (b) glows using little power (c) makes things spin (d) is a resistance knob
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  6. 6.What does an LED do? (a) boosts a small signal (b) blows if current is high (c) makes a beeping sound (d) glows using little power
  7. 7.True or false: a potentiometer is a resistance knob. (a) True (b) False
  8. 8.🧩 Which component has coloured bands? (a) buzzer (b) transistor (c) resistor (d) fuse
  9. 9.What does a potentiometer do? (a) senses how bright it is (b) has coloured bands (c) is a resistance knob (d) boosts a small signal
  10. 10.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) smooths a wobbly supply (d) lets current go one way
  11. 11.True or false: a resistor has coloured bands. (a) True (b) False
  12. 12.🧩 Which component lets current go one way? (a) capacitor (b) potentiometer (c) motor (d) diode
  13. 13.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
  14. 14.True or false: a thermistor senses how hot it is. (a) False (b) True
  15. 15.True or false: a diode lets current go one way. (a) True (b) False
  16. 16.What does a motor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) boosts a small signal (d) limits the current
  17. 17.True or false: a fuse senses how hot it is. (a) True (b) False
  18. 18.What does a buzzer do? (a) is a resistance knob (b) boosts a small signal (c) beeps for an alarm (d) lets current go one way
  19. 19.🧩 Which component turns a fan or wheels? (a) fuse (b) capacitor (c) motor (d) transistor
  20. 20.🧩 Which component senses how hot it is? (a) diode (b) LED (c) transistor (d) thermistor
  21. 21.What does a fuse do? (a) stores a little charge (b) smooths a wobbly supply (c) blows if current is high (d) makes things spin
  22. 22.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
  23. 23.🧩 Which component limits the current? (a) diode (b) motor (c) capacitor (d) resistor
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  25. 25.What does a capacitor do? (a) smooths a wobbly supply (b) has coloured bands (c) boosts a small signal (d) makes a beeping sound
  26. 26.What does an LDR do? (a) stores a little charge (b) turns a fan or wheels (c) makes things spin (d) senses how bright it is
  27. 27.True or false: a fuse beeps for an alarm. (a) False (b) True
  28. 28.True or false: a transistor senses how hot it is. (a) True (b) False
  29. 29.True or false: a transistor makes things spin. (a) True (b) False
  30. 30.🧩 Which component boosts a small signal? (a) thermistor (b) resistor (c) LDR (d) transistor
  31. 31.🧩 Which component makes things spin? (a) diode (b) LED (c) capacitor (d) motor
  32. 32.True or false: a motor lets current go one way. (a) True (b) False
  33. 33.🧩 Which component smooths a wobbly supply? (a) buzzer (b) transistor (c) resistor (d) capacitor
  34. 34.True or false: a diode blows if current is high. (a) True (b) False
  35. 35.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) thermistor (d) LED
  36. 36.What does a diode do? (a) has coloured bands (b) is a resistance knob (c) lets current go one way (d) senses how hot it is
  37. 37.True or false: a diode has coloured bands. (a) False (b) True
  38. 38.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) thermistor (d) transistor
  39. 39.True or false: an LED has coloured bands. (a) True (b) False
  40. 40.True or false: a resistor stores a little charge. (a) True (b) False

Answer key

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

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