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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 310 · 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.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
  4. 4.What does a fuse do? (a) senses how hot it is (b) makes things spin (c) turns a fan or wheels (d) blows if current is high
  5. 5.🧩 Which component has coloured bands? (a) LED (b) resistor (c) thermistor (d) capacitor
  6. 6.True or false: an LDR senses how bright it is. (a) False (b) True
  7. 7.What does a thermistor do? (a) glows using little power (b) senses how hot it is (c) limits the current (d) senses how bright it is
  8. 8.What does a transistor do? (a) is a resistance knob (b) smooths a wobbly supply (c) makes things spin (d) boosts a small signal
  9. 9.🧩 Which component is a resistance knob? (a) resistor (b) motor (c) potentiometer (d) capacitor
  10. 10.What does a resistor do? (a) boosts a small signal (b) has coloured bands (c) makes things spin (d) is a resistance knob
  11. 11.What does a diode do? (a) blows if current is high (b) senses how bright it is (c) stores a little charge (d) lets current go one way
  12. 12.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) transistor (d) diode
  13. 13.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) motor (d) capacitor
  14. 14.True or false: a resistor has coloured bands. (a) False (b) True
  15. 15.True or false: a transistor makes things spin. (a) False (b) True
  16. 16.True or false: a thermistor beeps for an alarm. (a) True (b) False
  17. 17.What does a buzzer do? (a) turns a fan or wheels (b) is a resistance knob (c) stores a little charge (d) makes a beeping sound
  18. 18.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) motor (d) fuse
  19. 19.🧩 Which component senses how bright it is? (a) motor (b) capacitor (c) thermistor (d) LDR
  20. 20.What does a potentiometer do? (a) senses how hot it is (b) glows using little power (c) limits the current (d) is a resistance knob
  21. 21.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) buzzer (d) fuse
  22. 22.What does an LED do? (a) makes things spin (b) smooths a wobbly supply (c) turns a fan or wheels (d) glows using little power
  23. 23.🧩 Which component makes a beeping sound? (a) transistor (b) diode (c) motor (d) buzzer
  24. 24.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) LED (d) motor
  25. 25.🧩 Which component boosts a small signal? (a) LDR (b) potentiometer (c) resistor (d) transistor
  26. 26.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  27. 27.🧩 Which component makes things spin? (a) potentiometer (b) LED (c) LDR (d) motor
  28. 28.True or false: a resistor senses how hot it is. (a) False (b) True
  29. 29.True or false: a potentiometer limits the current. (a) False (b) True
  30. 30.True or false: a buzzer beeps for an alarm. (a) False (b) True
  31. 31.What does a capacitor do? (a) boosts a small signal (b) glows using little power (c) beeps for an alarm (d) smooths a wobbly supply
  32. 32.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  33. 33.True or false: a capacitor stores a little charge. (a) True (b) False
  34. 34.True or false: a buzzer makes things spin. (a) False (b) True
  35. 35.True or false: a motor turns a fan or wheels. (a) False (b) True
  36. 36.True or false: an LDR has coloured bands. (a) False (b) True
  37. 37.True or false: a transistor turns a fan or wheels. (a) False (b) True
  38. 38.True or false: a diode stores a little charge. (a) False (b) True
  39. 39.🧩 Which component stores a little charge? (a) LED (b) motor (c) capacitor (d) transistor
  40. 40.True or false: a buzzer has coloured bands. (a) True (b) False

Answer key

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

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