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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 672 · 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.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) resistor (d) potentiometer
  2. 2.🧩 Which component smooths a wobbly supply? (a) thermistor (b) buzzer (c) resistor (d) capacitor
  3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  4. 4.True or false: a diode makes things spin. (a) False (b) True
  5. 5.True or false: a buzzer lets current go one way. (a) True (b) False
  6. 6.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  7. 7.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) resistor (d) fuse
  8. 8.What does a motor do? (a) turns a fan or wheels (b) has coloured bands (c) blows if current is high (d) senses how bright it is
  9. 9.True or false: a capacitor turns a fan or wheels. (a) False (b) True
  10. 10.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) potentiometer (d) transistor
  11. 11.🧩 Which component limits the current? (a) resistor (b) thermistor (c) fuse (d) LED
  12. 12.🧩 Which component boosts a small signal? (a) fuse (b) transistor (c) capacitor (d) thermistor
  13. 13.What does a motor do? (a) has coloured bands (b) makes things spin (c) is a resistance knob (d) beeps for an alarm
  14. 14.True or false: a buzzer beeps for an alarm. (a) False (b) True
  15. 15.True or false: a potentiometer is a resistance knob. (a) False (b) True
  16. 16.What does an LED do? (a) lets current go one way (b) makes a beeping sound (c) makes things spin (d) glows using little power
  17. 17.True or false: a capacitor stores a little charge. (a) True (b) False
  18. 18.True or false: a motor boosts a small signal. (a) True (b) False
  19. 19.🧩 Which component makes a beeping sound? (a) LED (b) potentiometer (c) buzzer (d) resistor
  20. 20.🧩 Which component has coloured bands? (a) resistor (b) LDR (c) fuse (d) potentiometer
  21. 21.What does a capacitor do? (a) senses how hot it is (b) stores a little charge (c) has coloured bands (d) blows if current is high
  22. 22.True or false: an LDR senses how bright it is. (a) False (b) True
  23. 23.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) capacitor (d) resistor
  24. 24.True or false: an LED glows using little power. (a) True (b) False
  25. 25.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) limits the current (d) glows using little power
  26. 26.True or false: an LDR makes things spin. (a) False (b) True
  27. 27.🧩 Which component makes things spin? (a) transistor (b) LDR (c) motor (d) resistor
  28. 28.True or false: a transistor boosts a small signal. (a) False (b) True
  29. 29.True or false: a fuse makes a beeping sound. (a) False (b) True
  30. 30.True or false: a resistor turns a fan or wheels. (a) False (b) True
  31. 31.True or false: a motor makes a beeping sound. (a) False (b) True
  32. 32.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  33. 33.True or false: a motor glows using little power. (a) True (b) False
  34. 34.What does a transistor do? (a) stores a little charge (b) limits the current (c) boosts a small signal (d) blows if current is high
  35. 35.True or false: a transistor senses how bright it is. (a) True (b) False
  36. 36.🧩 Which component is a resistance knob? (a) fuse (b) capacitor (c) motor (d) potentiometer
  37. 37.True or false: a thermistor senses how hot it is. (a) False (b) True
  38. 38.What does a buzzer do? (a) stores a little charge (b) senses how bright it is (c) makes a beeping sound (d) senses how hot it is
  39. 39.True or false: a fuse blows if current is high. (a) False (b) True
  40. 40.What does a thermistor do? (a) makes things spin (b) stores a little charge (c) senses how hot it is (d) blows if current is high

Answer key

  1. thermistor
  2. capacitor
  3. a buzzer
  4. False
  5. False
  6. store charge briefly
  7. motor
  8. turns a fan or wheels
  9. False
  10. capacitor
  11. resistor
  12. transistor
  13. makes things spin
  14. True
  15. True
  16. glows using little power
  17. True
  18. False
  19. buzzer
  20. resistor
  21. stores a little charge
  22. True
  23. fuse
  24. True
  25. beeps for an alarm
  26. False
  27. motor
  28. True
  29. False
  30. False
  31. False
  32. a motor
  33. False
  34. boosts a small signal
  35. False
  36. potentiometer
  37. True
  38. makes a beeping sound
  39. True
  40. senses how hot it is

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