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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 332 · 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 fuse do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) blows if current is high (d) senses how hot it is
  2. 2.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) transistor (d) motor
  3. 3.What does an LED do? (a) lets current go one way (b) limits the current (c) glows using little power (d) stores a little charge
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  5. 5.🧩 Which component glows using little power? (a) LDR (b) transistor (c) LED (d) buzzer
  6. 6.True or false: a fuse limits the current. (a) True (b) False
  7. 7.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) transistor (d) fuse
  8. 8.🧩 Which component senses how bright it is? (a) motor (b) fuse (c) LDR (d) buzzer
  9. 9.True or false: a thermistor blows if current is high. (a) False (b) True
  10. 10.What does a resistor do? (a) lets current go one way (b) smooths a wobbly supply (c) glows using little power (d) limits the current
  11. 11.True or false: an LDR senses how bright it is. (a) True (b) False
  12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  13. 13.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  14. 14.What does a buzzer do? (a) smooths a wobbly supply (b) blows if current is high (c) boosts a small signal (d) beeps for an alarm
  15. 15.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) fuse (d) potentiometer
  16. 16.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) diode (d) motor
  17. 17.🧩 Which component makes things spin? (a) motor (b) diode (c) resistor (d) buzzer
  18. 18.What does a motor do? (a) turns a fan or wheels (b) lets current go one way (c) blows if current is high (d) glows using little power
  19. 19.True or false: a buzzer makes a beeping sound. (a) False (b) True
  20. 20.🧩 Which component lets current go one way? (a) resistor (b) thermistor (c) capacitor (d) diode
  21. 21.What does a diode do? (a) boosts a small signal (b) has coloured bands (c) senses how hot it is (d) lets current go one way
  22. 22.True or false: a diode lets current go one way. (a) False (b) True
  23. 23.🧩 Which component stores a little charge? (a) transistor (b) LDR (c) capacitor (d) resistor
  24. 24.True or false: a resistor limits the current. (a) False (b) True
  25. 25.What does a potentiometer do? (a) stores a little charge (b) beeps for an alarm (c) makes a beeping sound (d) is a resistance knob
  26. 26.What does a buzzer do? (a) limits the current (b) blows if current is high (c) makes things spin (d) makes a beeping sound
  27. 27.True or false: a potentiometer glows using little power. (a) True (b) False
  28. 28.True or false: a transistor is a resistance knob. (a) False (b) True
  29. 29.What does a transistor do? (a) lets current go one way (b) limits the current (c) stores a little charge (d) boosts a small signal
  30. 30.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) diode (d) fuse
  31. 31.True or false: a motor turns a fan or wheels. (a) False (b) True
  32. 32.What does a thermistor do? (a) senses how hot it is (b) is a resistance knob (c) turns a fan or wheels (d) limits the current
  33. 33.True or false: a motor makes things spin. (a) False (b) True
  34. 34.True or false: a motor has coloured bands. (a) False (b) True
  35. 35.True or false: a capacitor stores a little charge. (a) True (b) False
  36. 36.True or false: a transistor stores a little charge. (a) True (b) False
  37. 37.True or false: a fuse blows if current is high. (a) False (b) True
  38. 38.🧩 Which component limits the current? (a) thermistor (b) capacitor (c) resistor (d) transistor
  39. 39.🧩 Which component beeps for an alarm? (a) buzzer (b) resistor (c) capacitor (d) thermistor
  40. 40.True or false: a diode smooths a wobbly supply. (a) False (b) True

Answer key

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

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