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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 452 · 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 limits the current. (a) True (b) False
  2. 2.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) resistor (d) LED
  3. 3.What does a motor do? (a) lets current go one way (b) beeps for an alarm (c) makes things spin (d) limits the current
  4. 4.What does a buzzer do? (a) blows if current is high (b) beeps for an alarm (c) is a resistance knob (d) senses how bright it is
  5. 5.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  6. 6.What does an LDR do? (a) turns a fan or wheels (b) boosts a small signal (c) lets current go one way (d) senses how bright it is
  7. 7.True or false: a resistor makes a beeping sound. (a) True (b) False
  8. 8.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
  9. 9.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) lets current go one way (d) has coloured bands
  10. 10.What does a resistor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) stores a little charge (d) limits the current
  11. 11.🧩 Which component makes a beeping sound? (a) LDR (b) buzzer (c) transistor (d) thermistor
  12. 12.True or false: a buzzer stores a little charge. (a) True (b) False
  13. 13.🧩 Which component has coloured bands? (a) transistor (b) diode (c) resistor (d) motor
  14. 14.🧩 Which component smooths a wobbly supply? (a) transistor (b) potentiometer (c) capacitor (d) thermistor
  15. 15.🧩 Which component glows using little power? (a) motor (b) buzzer (c) LED (d) transistor
  16. 16.What does a potentiometer do? (a) stores a little charge (b) limits the current (c) is a resistance knob (d) makes a beeping sound
  17. 17.🧩 Which component senses how bright it is? (a) motor (b) capacitor (c) buzzer (d) LDR
  18. 18.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  19. 19.True or false: a thermistor senses how hot it is. (a) False (b) True
  20. 20.What does a diode do? (a) lets current go one way (b) turns a fan or wheels (c) makes things spin (d) is a resistance knob
  21. 21.True or false: a diode has coloured bands. (a) True (b) False
  22. 22.True or false: a diode senses how hot it is. (a) True (b) False
  23. 23.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) resistor (d) fuse
  24. 24.True or false: a buzzer senses how bright it is. (a) True (b) False
  25. 25.🧩 Which component is a resistance knob? (a) transistor (b) thermistor (c) resistor (d) potentiometer
  26. 26.True or false: a thermistor blows if current is high. (a) True (b) False
  27. 27.True or false: a capacitor stores a little charge. (a) False (b) True
  28. 28.What does an LED do? (a) limits the current (b) blows if current is high (c) makes things spin (d) glows using little power
  29. 29.True or false: a resistor blows if current is high. (a) False (b) True
  30. 30.True or false: an LDR makes a beeping sound. (a) False (b) True
  31. 31.What does a fuse do? (a) makes things spin (b) lets current go one way (c) limits the current (d) blows if current is high
  32. 32.True or false: a transistor glows using little power. (a) False (b) True
  33. 33.True or false: a resistor limits the current. (a) False (b) True
  34. 34.What does a thermistor do? (a) limits the current (b) glows using little power (c) senses how hot it is (d) blows if current is high
  35. 35.True or false: a motor turns a fan or wheels. (a) False (b) True
  36. 36.True or false: a transistor turns a fan or wheels. (a) False (b) True
  37. 37.True or false: a potentiometer is a resistance knob. (a) False (b) True
  38. 38.True or false: a transistor senses how hot it is. (a) False (b) True
  39. 39.True or false: an LED stores a little charge. (a) False (b) True
  40. 40.True or false: a resistor is a resistance knob. (a) True (b) False

Answer key

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

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