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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 91 · 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.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  3. 3.True or false: an LDR senses how bright it is. (a) False (b) True
  4. 4.True or false: a motor lets current go one way. (a) False (b) True
  5. 5.🧩 Which component senses how bright it is? (a) capacitor (b) buzzer (c) transistor (d) LDR
  6. 6.🧩 Which component senses how hot it is? (a) motor (b) potentiometer (c) transistor (d) thermistor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  8. 8.True or false: an LED makes a beeping sound. (a) True (b) False
  9. 9.True or false: a diode lets current go one way. (a) False (b) True
  10. 10.True or false: a thermistor blows if current is high. (a) True (b) False
  11. 11.True or false: a resistor glows using little power. (a) True (b) False
  12. 12.🧩 Which component glows using little power? (a) LED (b) transistor (c) resistor (d) LDR
  13. 13.🧩 Which component has coloured bands? (a) diode (b) fuse (c) resistor (d) buzzer
  14. 14.What does a transistor do? (a) is a resistance knob (b) has coloured bands (c) boosts a small signal (d) glows using little power
  15. 15.🧩 Which component is a resistance knob? (a) LED (b) thermistor (c) potentiometer (d) fuse
  16. 16.True or false: a thermistor limits the current. (a) True (b) False
  17. 17.What does a capacitor do? (a) senses how hot it is (b) limits the current (c) stores a little charge (d) senses how bright it is
  18. 18.What does a fuse do? (a) is a resistance knob (b) smooths a wobbly supply (c) blows if current is high (d) senses how hot it is
  19. 19.🧩 Which component smooths a wobbly supply? (a) resistor (b) potentiometer (c) capacitor (d) transistor
  20. 20.True or false: a potentiometer senses how bright it is. (a) True (b) False
  21. 21.What does a resistor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) makes things spin (d) has coloured bands
  22. 22.What does an LDR do? (a) has coloured bands (b) blows if current is high (c) turns a fan or wheels (d) senses how bright it is
  23. 23.What does a potentiometer do? (a) is a resistance knob (b) senses how bright it is (c) boosts a small signal (d) makes a beeping sound
  24. 24.What does a capacitor do? (a) senses how bright it is (b) glows using little power (c) smooths a wobbly supply (d) is a resistance knob
  25. 25.True or false: an LDR is a resistance knob. (a) True (b) False
  26. 26.True or false: an LED limits the current. (a) False (b) True
  27. 27.What does a diode do? (a) senses how bright it is (b) glows using little power (c) makes a beeping sound (d) lets current go one way
  28. 28.True or false: a resistor limits the current. (a) True (b) False
  29. 29.True or false: a motor turns a fan or wheels. (a) False (b) True
  30. 30.What does a resistor do? (a) turns a fan or wheels (b) limits the current (c) glows using little power (d) lets current go one way
  31. 31.True or false: a buzzer makes a beeping sound. (a) True (b) False
  32. 32.🧩 Which component blows if current is high? (a) LED (b) LDR (c) buzzer (d) fuse
  33. 33.True or false: a fuse blows if current is high. (a) True (b) False
  34. 34.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  35. 35.🧩 Which component turns a fan or wheels? (a) motor (b) fuse (c) capacitor (d) buzzer
  36. 36.What does a thermistor do? (a) senses how hot it is (b) turns a fan or wheels (c) smooths a wobbly supply (d) glows using little power
  37. 37.True or false: a transistor glows using little power. (a) False (b) True
  38. 38.True or false: a capacitor senses how bright it is. (a) True (b) False
  39. 39.True or false: a transistor turns a fan or wheels. (a) True (b) False
  40. 40.True or false: an LDR has coloured bands. (a) False (b) True

Answer key

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

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