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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 572 · 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 capacitor smooths a wobbly supply. (a) True (b) False
  2. 2.What does a diode do? (a) lets current go one way (b) boosts a small signal (c) has coloured bands (d) turns a fan or wheels
  3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  4. 4.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) buzzer (d) transistor
  5. 5.True or false: a buzzer makes a beeping sound. (a) False (b) True
  6. 6.🧩 Which component senses how hot it is? (a) motor (b) resistor (c) transistor (d) thermistor
  7. 7.🧩 Which component beeps for an alarm? (a) diode (b) transistor (c) buzzer (d) LDR
  8. 8.🧩 Which component glows using little power? (a) transistor (b) LED (c) resistor (d) fuse
  9. 9.True or false: a diode lets current go one way. (a) False (b) True
  10. 10.True or false: a potentiometer is a resistance knob. (a) False (b) True
  11. 11.What does a capacitor do? (a) lets current go one way (b) has coloured bands (c) limits the current (d) stores a little charge
  12. 12.🧩 Which component turns a fan or wheels? (a) buzzer (b) LDR (c) motor (d) transistor
  13. 13.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
  14. 14.What does a motor do? (a) senses how hot it is (b) lets current go one way (c) makes things spin (d) beeps for an alarm
  15. 15.🧩 Which component has coloured bands? (a) resistor (b) motor (c) transistor (d) capacitor
  16. 16.🧩 Which component limits the current? (a) resistor (b) thermistor (c) diode (d) LDR
  17. 17.True or false: a potentiometer boosts a small signal. (a) False (b) True
  18. 18.What does an LDR do? (a) stores a little charge (b) smooths a wobbly supply (c) glows using little power (d) senses how bright it is
  19. 19.True or false: a fuse limits the current. (a) True (b) False
  20. 20.True or false: a motor makes things spin. (a) False (b) True
  21. 21.🧩 Which component lets current go one way? (a) diode (b) transistor (c) motor (d) thermistor
  22. 22.True or false: an LED glows using little power. (a) False (b) True
  23. 23.True or false: a capacitor makes things spin. (a) False (b) True
  24. 24.True or false: a transistor limits the current. (a) True (b) False
  25. 25.What does a potentiometer do? (a) stores a little charge (b) has coloured bands (c) senses how hot it is (d) is a resistance knob
  26. 26.What does a fuse do? (a) blows if current is high (b) makes things spin (c) makes a beeping sound (d) stores a little charge
  27. 27.True or false: a resistor has coloured bands. (a) False (b) True
  28. 28.True or false: an LED has coloured bands. (a) False (b) True
  29. 29.🧩 Which component boosts a small signal? (a) fuse (b) transistor (c) motor (d) thermistor
  30. 30.True or false: an LED turns a fan or wheels. (a) True (b) False
  31. 31.What does a motor do? (a) makes a beeping sound (b) stores a little charge (c) turns a fan or wheels (d) lets current go one way
  32. 32.True or false: a fuse blows if current is high. (a) False (b) True
  33. 33.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  34. 34.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) thermistor (d) motor
  35. 35.🧩 Which component blows if current is high? (a) fuse (b) diode (c) transistor (d) potentiometer
  36. 36.What does a transistor do? (a) turns a fan or wheels (b) beeps for an alarm (c) stores a little charge (d) boosts a small signal
  37. 37.True or false: a buzzer senses how bright it is. (a) True (b) False
  38. 38.🧩 Which component is a resistance knob? (a) LDR (b) motor (c) capacitor (d) potentiometer
  39. 39.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  40. 40.🧩 Which component makes a beeping sound? (a) LED (b) capacitor (c) buzzer (d) motor

Answer key

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

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