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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 602 · 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.What does a buzzer do? (a) senses how bright it is (b) beeps for an alarm (c) stores a little charge (d) lets current go one way
  2. 2.🧩 Which component makes a beeping sound? (a) capacitor (b) diode (c) LED (d) buzzer
  3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  4. 4.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  5. 5.True or false: a diode lets current go one way. (a) True (b) False
  6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  7. 7.What does a motor do? (a) limits the current (b) beeps for an alarm (c) senses how bright it is (d) makes things spin
  8. 8.🧩 Which component has coloured bands? (a) buzzer (b) LDR (c) motor (d) resistor
  9. 9.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) motor (d) fuse
  10. 10.True or false: an LDR blows if current is high. (a) False (b) True
  11. 11.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  12. 12.True or false: a fuse senses how hot it is. (a) True (b) False
  13. 13.What does a potentiometer do? (a) makes a beeping sound (b) has coloured bands (c) beeps for an alarm (d) is a resistance knob
  14. 14.What does a thermistor do? (a) turns a fan or wheels (b) senses how bright it is (c) senses how hot it is (d) is a resistance knob
  15. 15.What does an LDR do? (a) stores a little charge (b) makes things spin (c) blows if current is high (d) senses how bright it is
  16. 16.True or false: a motor turns a fan or wheels. (a) False (b) True
  17. 17.What does a resistor do? (a) has coloured bands (b) lets current go one way (c) turns a fan or wheels (d) boosts a small signal
  18. 18.🧩 Which component boosts a small signal? (a) potentiometer (b) LDR (c) motor (d) transistor
  19. 19.What does a capacitor do? (a) senses how hot it is (b) has coloured bands (c) glows using little power (d) stores a little charge
  20. 20.🧩 Which component beeps for an alarm? (a) diode (b) buzzer (c) motor (d) resistor
  21. 21.🧩 Which component lets current go one way? (a) resistor (b) LED (c) diode (d) thermistor
  22. 22.🧩 Which component makes things spin? (a) motor (b) buzzer (c) resistor (d) potentiometer
  23. 23.True or false: a potentiometer limits the current. (a) True (b) False
  24. 24.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) beeps for an alarm (d) lets current go one way
  25. 25.True or false: a transistor limits the current. (a) False (b) True
  26. 26.🧩 Which component blows if current is high? (a) fuse (b) diode (c) motor (d) LDR
  27. 27.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) fuse (d) resistor
  28. 28.True or false: a resistor senses how hot it is. (a) True (b) False
  29. 29.True or false: a potentiometer blows if current is high. (a) True (b) False
  30. 30.What does a diode do? (a) lets current go one way (b) has coloured bands (c) stores a little charge (d) boosts a small signal
  31. 31.What does a resistor do? (a) makes things spin (b) smooths a wobbly supply (c) limits the current (d) lets current go one way
  32. 32.True or false: a fuse has coloured bands. (a) False (b) True
  33. 33.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) LED (d) diode
  34. 34.True or false: a fuse blows if current is high. (a) False (b) True
  35. 35.True or false: a motor beeps for an alarm. (a) False (b) True
  36. 36.True or false: a resistor has coloured bands. (a) False (b) True
  37. 37.What does a fuse do? (a) makes things spin (b) is a resistance knob (c) blows if current is high (d) stores a little charge
  38. 38.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) buzzer (d) transistor
  39. 39.True or false: a transistor turns a fan or wheels. (a) True (b) False
  40. 40.True or false: a potentiometer is a resistance knob. (a) False (b) True

Answer key

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

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