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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 280 · 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 thermistor boosts a small signal. (a) False (b) True
  2. 2.What does a capacitor do? (a) smooths a wobbly supply (b) limits the current (c) turns a fan or wheels (d) blows if current is high
  3. 3.What does a resistor do? (a) makes a beeping sound (b) has coloured bands (c) lets current go one way (d) senses how bright it is
  4. 4.🧩 Which component smooths a wobbly supply? (a) resistor (b) LDR (c) diode (d) capacitor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  6. 6.True or false: an LDR senses how bright it is. (a) False (b) True
  7. 7.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  8. 8.True or false: a motor turns a fan or wheels. (a) False (b) True
  9. 9.True or false: an LED glows using little power. (a) False (b) True
  10. 10.🧩 Which component turns a fan or wheels? (a) potentiometer (b) LED (c) buzzer (d) motor
  11. 11.What does a motor do? (a) glows using little power (b) smooths a wobbly supply (c) makes things spin (d) limits the current
  12. 12.What does a buzzer do? (a) beeps for an alarm (b) limits the current (c) smooths a wobbly supply (d) turns a fan or wheels
  13. 13.True or false: a capacitor limits the current. (a) True (b) False
  14. 14.🧩 Which component stores a little charge? (a) buzzer (b) LDR (c) capacitor (d) LED
  15. 15.True or false: a transistor boosts a small signal. (a) False (b) True
  16. 16.True or false: a transistor is a resistance knob. (a) True (b) False
  17. 17.What does an LDR do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how bright it is (d) senses how hot it is
  18. 18.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) resistor (d) buzzer
  19. 19.What does a thermistor do? (a) makes things spin (b) lets current go one way (c) smooths a wobbly supply (d) senses how hot it is
  20. 20.🧩 Which component makes a beeping sound? (a) motor (b) resistor (c) potentiometer (d) buzzer
  21. 21.True or false: a resistor senses how hot it is. (a) True (b) False
  22. 22.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) resistor (d) thermistor
  23. 23.🧩 Which component limits the current? (a) motor (b) resistor (c) LDR (d) capacitor
  24. 24.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) is a resistance knob (d) limits the current
  25. 25.What does a resistor do? (a) senses how hot it is (b) limits the current (c) makes a beeping sound (d) beeps for an alarm
  26. 26.🧩 Which component senses how bright it is? (a) resistor (b) capacitor (c) LDR (d) transistor
  27. 27.🧩 Which component glows using little power? (a) potentiometer (b) fuse (c) thermistor (d) LED
  28. 28.🧩 Which component lets current go one way? (a) transistor (b) diode (c) resistor (d) LED
  29. 29.True or false: a motor is a resistance knob. (a) True (b) False
  30. 30.What does a transistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) glows using little power (d) stores a little charge
  31. 31.What does a fuse do? (a) turns a fan or wheels (b) blows if current is high (c) makes things spin (d) glows using little power
  32. 32.True or false: an LED senses how hot it is. (a) True (b) False
  33. 33.True or false: a potentiometer is a resistance knob. (a) True (b) False
  34. 34.True or false: a capacitor boosts a small signal. (a) True (b) False
  35. 35.🧩 Which component is a resistance knob? (a) LDR (b) thermistor (c) potentiometer (d) resistor
  36. 36.True or false: an LDR makes things spin. (a) False (b) True
  37. 37.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  38. 38.🧩 Which component blows if current is high? (a) diode (b) LDR (c) fuse (d) thermistor
  39. 39.True or false: a capacitor beeps for an alarm. (a) False (b) True
  40. 40.True or false: a potentiometer senses how bright it is. (a) True (b) False

Answer key

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

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