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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 284 · 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.What does a transistor do? (a) turns a fan or wheels (b) makes a beeping sound (c) senses how hot it is (d) boosts a small signal
  2. 2.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) fuse (d) LDR
  3. 3.True or false: a diode is a resistance knob. (a) False (b) True
  4. 4.🧩 Which component senses how bright it is? (a) potentiometer (b) capacitor (c) fuse (d) LDR
  5. 5.True or false: a fuse makes a beeping sound. (a) False (b) True
  6. 6.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) buzzer (d) motor
  7. 7.True or false: a transistor boosts a small signal. (a) True (b) False
  8. 8.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  9. 9.True or false: a motor makes things spin. (a) False (b) True
  10. 10.What does a capacitor do? (a) smooths a wobbly supply (b) glows using little power (c) turns a fan or wheels (d) has coloured bands
  11. 11.What does an LDR do? (a) senses how hot it is (b) senses how bright it is (c) makes things spin (d) lets current go one way
  12. 12.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  13. 13.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) thermistor (d) LDR
  14. 14.True or false: a diode stores a little charge. (a) True (b) False
  15. 15.What does a diode do? (a) makes things spin (b) lets current go one way (c) blows if current is high (d) limits the current
  16. 16.What does a potentiometer do? (a) lets current go one way (b) is a resistance knob (c) smooths a wobbly supply (d) glows using little power
  17. 17.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) makes things spin (d) lets current go one way
  18. 18.True or false: a thermistor senses how hot it is. (a) True (b) False
  19. 19.True or false: a capacitor is a resistance knob. (a) False (b) True
  20. 20.True or false: an LDR senses how bright it is. (a) False (b) True
  21. 21.🧩 Which component boosts a small signal? (a) potentiometer (b) capacitor (c) fuse (d) transistor
  22. 22.True or false: a capacitor glows using little power. (a) True (b) False
  23. 23.True or false: an LED turns a fan or wheels. (a) True (b) False
  24. 24.True or false: a motor turns a fan or wheels. (a) False (b) True
  25. 25.What does a buzzer do? (a) makes a beeping sound (b) smooths a wobbly supply (c) limits the current (d) is a resistance knob
  26. 26.🧩 Which component glows using little power? (a) motor (b) potentiometer (c) LED (d) buzzer
  27. 27.🧩 Which component senses how hot it is? (a) diode (b) capacitor (c) LED (d) thermistor
  28. 28.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  29. 29.🧩 Which component makes things spin? (a) LED (b) buzzer (c) motor (d) LDR
  30. 30.True or false: a capacitor makes a beeping sound. (a) False (b) True
  31. 31.True or false: a fuse has coloured bands. (a) False (b) True
  32. 32.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) transistor (d) LED
  33. 33.What does a capacitor do? (a) glows using little power (b) boosts a small signal (c) limits the current (d) stores a little charge
  34. 34.🧩 Which component stores a little charge? (a) potentiometer (b) resistor (c) capacitor (d) transistor
  35. 35.True or false: an LED glows using little power. (a) False (b) True
  36. 36.🧩 Which component beeps for an alarm? (a) resistor (b) potentiometer (c) thermistor (d) buzzer
  37. 37.True or false: a capacitor stores a little charge. (a) False (b) True
  38. 38.🧩 Which component blows if current is high? (a) fuse (b) resistor (c) potentiometer (d) LDR
  39. 39.🧩 Which component lets current go one way? (a) resistor (b) fuse (c) potentiometer (d) diode
  40. 40.True or false: a buzzer makes a beeping sound. (a) False (b) True

Answer key

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

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