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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 506 · 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 lets current go one way? (a) LED (b) LDR (c) diode (d) capacitor
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  3. 3.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) potentiometer (d) thermistor
  4. 4.🧩 Which component boosts a small signal? (a) potentiometer (b) transistor (c) thermistor (d) buzzer
  5. 5.🧩 Which component blows if current is high? (a) fuse (b) diode (c) LED (d) resistor
  6. 6.What does a thermistor do? (a) senses how hot it is (b) beeps for an alarm (c) turns a fan or wheels (d) makes things spin
  7. 7.True or false: a fuse blows if current is high. (a) True (b) False
  8. 8.True or false: a motor beeps for an alarm. (a) True (b) False
  9. 9.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) makes things spin
  10. 10.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) LDR (d) fuse
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  12. 12.What does a capacitor do? (a) boosts a small signal (b) has coloured bands (c) blows if current is high (d) stores a little charge
  13. 13.What does a buzzer do? (a) blows if current is high (b) makes a beeping sound (c) senses how hot it is (d) limits the current
  14. 14.True or false: a capacitor stores a little charge. (a) False (b) True
  15. 15.What does a diode do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) lets current go one way (d) glows using little power
  16. 16.True or false: an LED glows using little power. (a) False (b) True
  17. 17.True or false: a resistor has coloured bands. (a) False (b) True
  18. 18.True or false: a buzzer senses how hot it is. (a) False (b) True
  19. 19.🧩 Which component is a resistance knob? (a) resistor (b) LED (c) potentiometer (d) diode
  20. 20.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) stores a little charge (d) senses how bright it is
  21. 21.🧩 Which component makes things spin? (a) LED (b) motor (c) capacitor (d) fuse
  22. 22.True or false: a diode smooths a wobbly supply. (a) True (b) False
  23. 23.True or false: a diode lets current go one way. (a) True (b) False
  24. 24.🧩 Which component beeps for an alarm? (a) fuse (b) potentiometer (c) buzzer (d) resistor
  25. 25.True or false: a buzzer limits the current. (a) True (b) False
  26. 26.True or false: an LED limits the current. (a) True (b) False
  27. 27.True or false: an LDR senses how bright it is. (a) False (b) True
  28. 28.True or false: an LDR beeps for an alarm. (a) False (b) True
  29. 29.🧩 Which component senses how bright it is? (a) fuse (b) motor (c) LDR (d) resistor
  30. 30.What does a resistor do? (a) lets current go one way (b) has coloured bands (c) beeps for an alarm (d) senses how bright it is
  31. 31.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  32. 32.🧩 Which component has coloured bands? (a) motor (b) resistor (c) LDR (d) capacitor
  33. 33.What does a capacitor do? (a) senses how bright it is (b) boosts a small signal (c) smooths a wobbly supply (d) senses how hot it is
  34. 34.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) has coloured bands (d) lets current go one way
  35. 35.True or false: a motor makes a beeping sound. (a) False (b) True
  36. 36.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  37. 37.🧩 Which component senses how hot it is? (a) fuse (b) potentiometer (c) thermistor (d) LDR
  38. 38.What does a diode do? (a) lets current go one way (b) is a resistance knob (c) smooths a wobbly supply (d) stores a little charge
  39. 39.True or false: a potentiometer is a resistance knob. (a) False (b) True
  40. 40.True or false: an LED blows if current is high. (a) True (b) False

Answer key

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

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