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Electronics Worksheet: Electronic Components

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

Answer key

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

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