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Electronics Worksheet: Electronic Components

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

Answer key

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

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