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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 437 · 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 potentiometer blows if current is high. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  3. 3.True or false: a motor makes things spin. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  5. 5.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) LED (d) transistor
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  7. 7.What does an LDR do? (a) senses how bright it is (b) turns a fan or wheels (c) glows using little power (d) boosts a small signal
  8. 8.What does a thermistor do? (a) glows using little power (b) senses how hot it is (c) smooths a wobbly supply (d) boosts a small signal
  9. 9.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) beeps for an alarm (d) blows if current is high
  10. 10.🧩 Which component has coloured bands? (a) thermistor (b) resistor (c) diode (d) potentiometer
  11. 11.True or false: a fuse beeps for an alarm. (a) False (b) True
  12. 12.What does a buzzer do? (a) boosts a small signal (b) limits the current (c) has coloured bands (d) beeps for an alarm
  13. 13.True or false: a motor is a resistance knob. (a) False (b) True
  14. 14.🧩 Which component senses how bright it is? (a) diode (b) transistor (c) LDR (d) capacitor
  15. 15.What does a fuse do? (a) glows using little power (b) senses how bright it is (c) boosts a small signal (d) blows if current is high
  16. 16.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) LDR (d) fuse
  17. 17.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  18. 18.What does a buzzer do? (a) senses how hot it is (b) glows using little power (c) limits the current (d) makes a beeping sound
  19. 19.What does an LED do? (a) limits the current (b) glows using little power (c) smooths a wobbly supply (d) makes a beeping sound
  20. 20.🧩 Which component senses how hot it is? (a) transistor (b) fuse (c) motor (d) thermistor
  21. 21.True or false: a buzzer limits the current. (a) False (b) True
  22. 22.🧩 Which component limits the current? (a) resistor (b) buzzer (c) potentiometer (d) LDR
  23. 23.True or false: a capacitor beeps for an alarm. (a) True (b) False
  24. 24.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) fuse (c) capacitor (d) transistor
  25. 25.🧩 Which component glows using little power? (a) transistor (b) LDR (c) LED (d) buzzer
  26. 26.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) potentiometer (d) capacitor
  27. 27.True or false: a thermistor stores a little charge. (a) False (b) True
  28. 28.True or false: a resistor senses how bright it is. (a) False (b) True
  29. 29.🧩 Which component blows if current is high? (a) transistor (b) LED (c) capacitor (d) fuse
  30. 30.What does a diode do? (a) turns a fan or wheels (b) blows if current is high (c) stores a little charge (d) lets current go one way
  31. 31.True or false: an LED limits the current. (a) True (b) False
  32. 32.True or false: a fuse blows if current is high. (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 transistor smooths a wobbly supply. (a) True (b) False
  35. 35.True or false: a resistor limits the current. (a) True (b) False
  36. 36.🧩 Which component is a resistance knob? (a) resistor (b) LED (c) potentiometer (d) diode
  37. 37.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) makes things spin (d) blows if current is high
  38. 38.What does a capacitor do? (a) smooths a wobbly supply (b) senses how bright it is (c) makes things spin (d) senses how hot it is
  39. 39.What does a capacitor do? (a) senses how hot it is (b) makes a beeping sound (c) stores a little charge (d) glows using little power
  40. 40.True or false: an LDR blows if current is high. (a) True (b) False

Answer key

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

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