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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 61 · 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: an LED stores a little charge. (a) False (b) True
  2. 2.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) fuse (d) motor
  3. 3.🧩 Which component has coloured bands? (a) LDR (b) motor (c) resistor (d) LED
  4. 4.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) has coloured bands (d) limits the current
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  6. 6.🧩 Which component smooths a wobbly supply? (a) thermistor (b) capacitor (c) fuse (d) potentiometer
  7. 7.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) LDR (d) buzzer
  8. 8.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) makes things spin (d) beeps for an alarm
  9. 9.True or false: a buzzer senses how hot it is. (a) False (b) True
  10. 10.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  11. 11.What does a thermistor do? (a) senses how hot it is (b) makes a beeping sound (c) smooths a wobbly supply (d) is a resistance knob
  12. 12.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) stores a little charge (d) glows using little power
  13. 13.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) senses how hot it is (d) makes things spin
  14. 14.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) transistor (d) LED
  15. 15.True or false: a capacitor is a resistance knob. (a) True (b) False
  16. 16.What does a potentiometer do? (a) is a resistance knob (b) lets current go one way (c) makes things spin (d) boosts a small signal
  17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  18. 18.True or false: a transistor boosts a small signal. (a) True (b) False
  19. 19.True or false: a buzzer makes things spin. (a) True (b) False
  20. 20.True or false: a capacitor stores a little charge. (a) False (b) True
  21. 21.🧩 Which component limits the current? (a) motor (b) thermistor (c) resistor (d) diode
  22. 22.True or false: an LED glows using little power. (a) False (b) True
  23. 23.What does an LED do? (a) lets current go one way (b) glows using little power (c) senses how bright it is (d) smooths a wobbly supply
  24. 24.🧩 Which component blows if current is high? (a) transistor (b) buzzer (c) LDR (d) fuse
  25. 25.True or false: a motor turns a fan or wheels. (a) False (b) True
  26. 26.What does a resistor do? (a) is a resistance knob (b) limits the current (c) lets current go one way (d) glows using little power
  27. 27.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) stores a little charge (d) has coloured bands
  28. 28.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  29. 29.🧩 Which component stores a little charge? (a) buzzer (b) LED (c) capacitor (d) fuse
  30. 30.True or false: an LDR glows using little power. (a) True (b) False
  31. 31.What does a fuse do? (a) senses how hot it is (b) boosts a small signal (c) glows using little power (d) blows if current is high
  32. 32.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) resistor (d) capacitor
  33. 33.True or false: a capacitor blows if current is high. (a) True (b) False
  34. 34.True or false: a resistor senses how bright it is. (a) True (b) False
  35. 35.🧩 Which component glows using little power? (a) capacitor (b) LDR (c) fuse (d) LED
  36. 36.What does a capacitor do? (a) lets current go one way (b) glows using little power (c) limits the current (d) stores a little charge
  37. 37.True or false: a diode lets current go one way. (a) False (b) True
  38. 38.What does a capacitor do? (a) senses how hot it is (b) turns a fan or wheels (c) smooths a wobbly supply (d) has coloured bands
  39. 39.True or false: a thermistor senses how hot it is. (a) False (b) True
  40. 40.True or false: a resistor smooths a wobbly supply. (a) False (b) True

Answer key

  1. False
  2. transistor
  3. resistor
  4. makes things spin
  5. store charge briefly
  6. capacitor
  7. thermistor
  8. has coloured bands
  9. False
  10. a buzzer
  11. senses how hot it is
  12. lets current go one way
  13. makes a beeping sound
  14. buzzer
  15. False
  16. is a resistance knob
  17. a motor
  18. True
  19. False
  20. True
  21. resistor
  22. True
  23. glows using little power
  24. fuse
  25. True
  26. limits the current
  27. boosts a small signal
  28. True
  29. capacitor
  30. False
  31. blows if current is high
  32. potentiometer
  33. False
  34. False
  35. LED
  36. stores a little charge
  37. True
  38. smooths a wobbly supply
  39. True
  40. False

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