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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 707 · 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.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
  2. 2.🧩 Which component senses how bright it is? (a) motor (b) fuse (c) LDR (d) buzzer
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  4. 4.🧩 Which component senses how hot it is? (a) motor (b) LED (c) LDR (d) thermistor
  5. 5.🧩 Which component lets current go one way? (a) fuse (b) resistor (c) thermistor (d) diode
  6. 6.True or false: a thermistor senses how hot it is. (a) False (b) True
  7. 7.What does an LDR do? (a) senses how bright it is (b) glows using little power (c) lets current go one way (d) has coloured bands
  8. 8.True or false: a resistor has coloured bands. (a) True (b) False
  9. 9.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  10. 10.🧩 Which component makes a beeping sound? (a) resistor (b) thermistor (c) diode (d) buzzer
  11. 11.What does an LED do? (a) senses how hot it is (b) stores a little charge (c) turns a fan or wheels (d) glows using little power
  12. 12.🧩 Which component has coloured bands? (a) potentiometer (b) thermistor (c) resistor (d) diode
  13. 13.True or false: a fuse boosts a small signal. (a) False (b) True
  14. 14.🧩 Which component glows using little power? (a) thermistor (b) buzzer (c) LED (d) potentiometer
  15. 15.What does a resistor do? (a) turns a fan or wheels (b) has coloured bands (c) glows using little power (d) stores a little charge
  16. 16.What does a diode do? (a) beeps for an alarm (b) senses how bright it is (c) senses how hot it is (d) lets current go one way
  17. 17.True or false: a motor turns a fan or wheels. (a) True (b) False
  18. 18.True or false: a buzzer glows using little power. (a) True (b) False
  19. 19.What does a buzzer do? (a) has coloured bands (b) lets current go one way (c) makes a beeping sound (d) senses how hot it is
  20. 20.🧩 Which component blows if current is high? (a) transistor (b) LDR (c) fuse (d) buzzer
  21. 21.What does a transistor do? (a) boosts a small signal (b) stores a little charge (c) turns a fan or wheels (d) senses how hot it is
  22. 22.🧩 Which component boosts a small signal? (a) diode (b) capacitor (c) transistor (d) LED
  23. 23.True or false: a buzzer has coloured bands. (a) True (b) False
  24. 24.True or false: a diode lets current go one way. (a) True (b) False
  25. 25.True or false: an LED glows using little power. (a) True (b) False
  26. 26.🧩 Which component beeps for an alarm? (a) buzzer (b) LDR (c) motor (d) transistor
  27. 27.What does a capacitor do? (a) limits the current (b) makes things spin (c) senses how hot it is (d) stores a little charge
  28. 28.What does a capacitor do? (a) blows if current is high (b) makes things spin (c) smooths a wobbly supply (d) boosts a small signal
  29. 29.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) fuse (d) transistor
  30. 30.True or false: a motor makes things spin. (a) True (b) False
  31. 31.True or false: a transistor senses how hot it is. (a) False (b) True
  32. 32.True or false: a resistor blows if current is high. (a) False (b) True
  33. 33.What does a thermistor do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) senses how hot it is
  34. 34.What does a motor do? (a) senses how hot it is (b) makes things spin (c) limits the current (d) smooths a wobbly supply
  35. 35.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  36. 36.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) makes things spin (d) blows if current is high
  37. 37.🧩 Which component limits the current? (a) transistor (b) buzzer (c) resistor (d) LDR
  38. 38.True or false: a transistor glows using little power. (a) True (b) False
  39. 39.True or false: a potentiometer makes things spin. (a) True (b) False
  40. 40.True or false: a resistor limits the current. (a) True (b) False

Answer key

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

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