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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 315 · 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 senses how hot it is. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  3. 3.What does an LED do? (a) glows using little power (b) lets current go one way (c) senses how hot it is (d) makes things spin
  4. 4.True or false: a fuse blows if current is high. (a) False (b) True
  5. 5.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) capacitor (d) LED
  6. 6.What does an LDR do? (a) smooths a wobbly supply (b) boosts a small signal (c) senses how bright it is (d) lets current go one way
  7. 7.What does a buzzer do? (a) senses how hot it is (b) makes a beeping sound (c) boosts a small signal (d) blows if current is high
  8. 8.True or false: an LDR senses how bright it is. (a) False (b) True
  9. 9.True or false: a thermistor makes things spin. (a) True (b) False
  10. 10.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) buzzer (d) capacitor
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  12. 12.What does a fuse do? (a) blows if current is high (b) glows using little power (c) senses how hot it is (d) lets current go one way
  13. 13.True or false: a buzzer glows using little power. (a) False (b) True
  14. 14.True or false: a capacitor glows using little power. (a) True (b) False
  15. 15.True or false: a diode senses how bright it is. (a) False (b) True
  16. 16.🧩 Which component turns a fan or wheels? (a) transistor (b) LDR (c) LED (d) motor
  17. 17.🧩 Which component has coloured bands? (a) resistor (b) motor (c) capacitor (d) potentiometer
  18. 18.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  19. 19.🧩 Which component glows using little power? (a) potentiometer (b) LED (c) resistor (d) diode
  20. 20.What does a thermistor do? (a) senses how hot it is (b) glows using little power (c) blows if current is high (d) senses how bright it is
  21. 21.True or false: an LED makes things spin. (a) True (b) False
  22. 22.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  23. 23.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) transistor (d) motor
  24. 24.True or false: an LDR makes a beeping sound. (a) True (b) False
  25. 25.🧩 Which component senses how bright it is? (a) motor (b) LED (c) LDR (d) capacitor
  26. 26.What does a capacitor do? (a) is a resistance knob (b) lets current go one way (c) senses how hot it is (d) smooths a wobbly supply
  27. 27.True or false: a thermistor blows if current is high. (a) False (b) True
  28. 28.🧩 Which component makes things spin? (a) LDR (b) thermistor (c) potentiometer (d) motor
  29. 29.🧩 Which component is a resistance knob? (a) capacitor (b) fuse (c) diode (d) potentiometer
  30. 30.True or false: a capacitor stores a little charge. (a) True (b) False
  31. 31.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) has coloured bands (d) senses how hot it is
  32. 32.True or false: a transistor beeps for an alarm. (a) True (b) False
  33. 33.True or false: an LDR turns a fan or wheels. (a) False (b) True
  34. 34.True or false: a buzzer beeps for an alarm. (a) True (b) False
  35. 35.True or false: a resistor has coloured bands. (a) False (b) True
  36. 36.🧩 Which component lets current go one way? (a) buzzer (b) fuse (c) diode (d) potentiometer
  37. 37.True or false: a fuse makes things spin. (a) False (b) True
  38. 38.True or false: a resistor limits the current. (a) True (b) False
  39. 39.What does a motor do? (a) makes a beeping sound (b) blows if current is high (c) has coloured bands (d) turns a fan or wheels
  40. 40.True or false: an LED blows if current is high. (a) True (b) False

Answer key

  1. True
  2. a motor
  3. glows using little power
  4. True
  5. buzzer
  6. senses how bright it is
  7. makes a beeping sound
  8. True
  9. False
  10. fuse
  11. a buzzer
  12. blows if current is high
  13. False
  14. False
  15. False
  16. motor
  17. resistor
  18. store charge briefly
  19. LED
  20. senses how hot it is
  21. False
  22. True
  23. buzzer
  24. False
  25. LDR
  26. smooths a wobbly supply
  27. False
  28. motor
  29. potentiometer
  30. True
  31. boosts a small signal
  32. False
  33. False
  34. True
  35. True
  36. diode
  37. False
  38. True
  39. turns a fan or wheels
  40. False

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