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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 352 · 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 capacitor stores a little charge. (a) True (b) False
  2. 2.What does a diode do? (a) senses how bright it is (b) stores a little charge (c) lets current go one way (d) has coloured bands
  3. 3.True or false: a transistor boosts a small signal. (a) False (b) True
  4. 4.What does a buzzer do? (a) smooths a wobbly supply (b) beeps for an alarm (c) glows using little power (d) limits the current
  5. 5.True or false: a buzzer blows if current is high. (a) False (b) True
  6. 6.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  8. 8.🧩 Which component is a resistance knob? (a) capacitor (b) buzzer (c) potentiometer (d) diode
  9. 9.What does a transistor do? (a) makes things spin (b) boosts a small signal (c) makes a beeping sound (d) smooths a wobbly supply
  10. 10.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  11. 11.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) buzzer (d) LED
  12. 12.True or false: a resistor has coloured bands. (a) False (b) True
  13. 13.🧩 Which component boosts a small signal? (a) LDR (b) LED (c) transistor (d) diode
  14. 14.🧩 Which component glows using little power? (a) capacitor (b) resistor (c) LED (d) thermistor
  15. 15.What does a buzzer do? (a) has coloured bands (b) makes a beeping sound (c) turns a fan or wheels (d) smooths a wobbly supply
  16. 16.True or false: an LED glows using little power. (a) False (b) True
  17. 17.🧩 Which component limits the current? (a) LED (b) resistor (c) thermistor (d) motor
  18. 18.What does a capacitor do? (a) blows if current is high (b) glows using little power (c) lets current go one way (d) stores a little charge
  19. 19.What does a capacitor do? (a) senses how bright it is (b) smooths a wobbly supply (c) glows using little power (d) limits the current
  20. 20.True or false: a diode lets current go one way. (a) True (b) False
  21. 21.True or false: a motor stores a little charge. (a) True (b) False
  22. 22.True or false: an LDR lets current go one way. (a) True (b) False
  23. 23.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) lets current go one way (d) makes things spin
  24. 24.What does an LDR do? (a) smooths a wobbly supply (b) senses how hot it is (c) senses how bright it is (d) stores a little charge
  25. 25.🧩 Which component makes a beeping sound? (a) transistor (b) LED (c) resistor (d) buzzer
  26. 26.🧩 Which component beeps for an alarm? (a) buzzer (b) LDR (c) resistor (d) diode
  27. 27.True or false: a buzzer makes a beeping sound. (a) True (b) False
  28. 28.True or false: a motor blows if current is high. (a) True (b) False
  29. 29.🧩 Which component smooths a wobbly supply? (a) transistor (b) LDR (c) capacitor (d) thermistor
  30. 30.🧩 Which component turns a fan or wheels? (a) resistor (b) diode (c) thermistor (d) motor
  31. 31.True or false: an LDR glows using little power. (a) True (b) False
  32. 32.What does a potentiometer do? (a) makes a beeping sound (b) makes things spin (c) is a resistance knob (d) blows if current is high
  33. 33.True or false: a thermistor stores a little charge. (a) False (b) True
  34. 34.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) lets current go one way (d) limits the current
  35. 35.🧩 Which component senses how bright it is? (a) transistor (b) LDR (c) potentiometer (d) diode
  36. 36.True or false: a fuse boosts a small signal. (a) True (b) False
  37. 37.🧩 Which component senses how hot it is? (a) LED (b) capacitor (c) thermistor (d) resistor
  38. 38.True or false: a buzzer senses how hot it is. (a) True (b) False
  39. 39.True or false: a resistor limits the current. (a) True (b) False
  40. 40.What does a fuse do? (a) blows if current is high (b) beeps for an alarm (c) lets current go one way (d) senses how hot it is

Answer key

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

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