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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 441 · 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 fuse boosts a small signal. (a) False (b) True
  2. 2.🧩 Which component is a resistance knob? (a) potentiometer (b) resistor (c) buzzer (d) LDR
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  4. 4.True or false: a fuse blows if current is high. (a) False (b) True
  5. 5.🧩 Which component turns a fan or wheels? (a) resistor (b) motor (c) buzzer (d) LED
  6. 6.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) senses how hot it is (d) glows using little power
  7. 7.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) is a resistance knob (d) makes a beeping sound
  8. 8.🧩 Which component stores a little charge? (a) diode (b) capacitor (c) fuse (d) LED
  9. 9.True or false: a transistor boosts a small signal. (a) False (b) True
  10. 10.🧩 Which component boosts a small signal? (a) fuse (b) buzzer (c) diode (d) transistor
  11. 11.🧩 Which component has coloured bands? (a) resistor (b) LDR (c) fuse (d) buzzer
  12. 12.🧩 Which component makes things spin? (a) thermistor (b) motor (c) potentiometer (d) fuse
  13. 13.What does a resistor do? (a) has coloured bands (b) makes a beeping sound (c) stores a little charge (d) blows if current is high
  14. 14.🧩 Which component senses how bright it is? (a) fuse (b) transistor (c) capacitor (d) LDR
  15. 15.True or false: a resistor has coloured bands. (a) False (b) True
  16. 16.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) has coloured bands (d) makes things spin
  17. 17.True or false: a buzzer senses how hot it is. (a) True (b) False
  18. 18.🧩 Which component smooths a wobbly supply? (a) motor (b) thermistor (c) capacitor (d) fuse
  19. 19.🧩 Which component lets current go one way? (a) fuse (b) resistor (c) diode (d) LED
  20. 20.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  21. 21.True or false: an LDR senses how bright it is. (a) True (b) False
  22. 22.True or false: a thermistor senses how bright it is. (a) False (b) True
  23. 23.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  24. 24.What does a buzzer do? (a) blows if current is high (b) smooths a wobbly supply (c) makes a beeping sound (d) has coloured bands
  25. 25.🧩 Which component limits the current? (a) buzzer (b) LED (c) resistor (d) capacitor
  26. 26.True or false: a potentiometer glows using little power. (a) True (b) False
  27. 27.What does a motor do? (a) turns a fan or wheels (b) glows using little power (c) stores a little charge (d) is a resistance knob
  28. 28.🧩 Which component makes a beeping sound? (a) fuse (b) motor (c) diode (d) buzzer
  29. 29.True or false: a motor makes things spin. (a) False (b) True
  30. 30.True or false: a motor stores a little charge. (a) False (b) True
  31. 31.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  32. 32.True or false: a capacitor makes a beeping sound. (a) True (b) False
  33. 33.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  34. 34.True or false: a buzzer lets current go one way. (a) True (b) False
  35. 35.What does an LED do? (a) senses how hot it is (b) smooths a wobbly supply (c) glows using little power (d) blows if current is high
  36. 36.What does a buzzer do? (a) stores a little charge (b) turns a fan or wheels (c) senses how bright it is (d) beeps for an alarm
  37. 37.True or false: a thermistor senses how hot it is. (a) False (b) True
  38. 38.What does a potentiometer do? (a) smooths a wobbly supply (b) boosts a small signal (c) is a resistance knob (d) turns a fan or wheels
  39. 39.True or false: a motor turns a fan or wheels. (a) False (b) True
  40. 40.True or false: a fuse has coloured bands. (a) False (b) True

Answer key

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

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