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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 322 · 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 resistor has coloured bands. (a) False (b) True
  2. 2.True or false: a capacitor lets current go one way. (a) True (b) False
  3. 3.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  5. 5.🧩 Which component has coloured bands? (a) LDR (b) thermistor (c) LED (d) resistor
  6. 6.True or false: a fuse blows if current is high. (a) False (b) True
  7. 7.True or false: a diode smooths a wobbly supply. (a) True (b) False
  8. 8.What does a motor do? (a) turns a fan or wheels (b) senses how hot it is (c) has coloured bands (d) makes a beeping sound
  9. 9.What does a resistor do? (a) lets current go one way (b) has coloured bands (c) senses how hot it is (d) stores a little charge
  10. 10.True or false: an LDR limits the current. (a) True (b) False
  11. 11.What does a potentiometer do? (a) limits the current (b) turns a fan or wheels (c) is a resistance knob (d) boosts a small signal
  12. 12.What does a capacitor do? (a) is a resistance knob (b) makes a beeping sound (c) senses how hot it is (d) smooths a wobbly supply
  13. 13.True or false: a buzzer makes a beeping sound. (a) True (b) False
  14. 14.What does a fuse do? (a) is a resistance knob (b) has coloured bands (c) blows if current is high (d) lets current go one way
  15. 15.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  16. 16.True or false: a capacitor boosts a small signal. (a) False (b) True
  17. 17.🧩 Which component boosts a small signal? (a) diode (b) transistor (c) thermistor (d) potentiometer
  18. 18.True or false: a transistor boosts a small signal. (a) False (b) True
  19. 19.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) thermistor (d) LED
  20. 20.What does a buzzer do? (a) glows using little power (b) beeps for an alarm (c) has coloured bands (d) smooths a wobbly supply
  21. 21.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) motor (d) LED
  22. 22.What does a transistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) boosts a small signal (d) is a resistance knob
  23. 23.🧩 Which component is a resistance knob? (a) thermistor (b) transistor (c) potentiometer (d) buzzer
  24. 24.🧩 Which component lets current go one way? (a) motor (b) LED (c) diode (d) capacitor
  25. 25.True or false: a buzzer senses how hot it is. (a) True (b) False
  26. 26.True or false: a motor beeps for an alarm. (a) True (b) False
  27. 27.True or false: a motor makes things spin. (a) False (b) True
  28. 28.True or false: a capacitor is a resistance knob. (a) True (b) False
  29. 29.What does a motor do? (a) beeps for an alarm (b) glows using little power (c) smooths a wobbly supply (d) makes things spin
  30. 30.True or false: a motor turns a fan or wheels. (a) False (b) True
  31. 31.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) thermistor (d) resistor
  32. 32.True or false: a capacitor blows if current is high. (a) True (b) False
  33. 33.True or false: a resistor limits the current. (a) True (b) False
  34. 34.🧩 Which component beeps for an alarm? (a) fuse (b) resistor (c) diode (d) buzzer
  35. 35.What does a capacitor do? (a) blows if current is high (b) makes a beeping sound (c) stores a little charge (d) senses how hot it is
  36. 36.What does a diode do? (a) limits the current (b) makes a beeping sound (c) senses how bright it is (d) lets current go one way
  37. 37.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) diode (d) potentiometer
  38. 38.True or false: a motor is a resistance knob. (a) True (b) False
  39. 39.🧩 Which component makes things spin? (a) motor (b) LED (c) thermistor (d) diode
  40. 40.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) is a resistance knob (d) beeps for an alarm

Answer key

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

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