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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 471 · 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 fuse (b) a motor (c) a resistor (d) an LED
  2. 2.🧩 Which component is a resistance knob? (a) potentiometer (b) buzzer (c) transistor (d) thermistor
  3. 3.🧩 Which component blows if current is high? (a) LDR (b) resistor (c) fuse (d) thermistor
  4. 4.True or false: a capacitor stores a little charge. (a) True (b) False
  5. 5.What does a motor do? (a) makes things spin (b) limits the current (c) lets current go one way (d) blows if current is high
  6. 6.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  7. 7.True or false: a motor makes things spin. (a) False (b) True
  8. 8.What does an LED do? (a) stores a little charge (b) senses how bright it is (c) is a resistance knob (d) glows using little power
  9. 9.True or false: a potentiometer lets current go one way. (a) True (b) False
  10. 10.What does a thermistor do? (a) makes a beeping sound (b) turns a fan or wheels (c) beeps for an alarm (d) senses how hot it is
  11. 11.🧩 Which component limits the current? (a) capacitor (b) thermistor (c) transistor (d) resistor
  12. 12.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  13. 13.🧩 Which component glows using little power? (a) capacitor (b) thermistor (c) LED (d) motor
  14. 14.What does a diode do? (a) is a resistance knob (b) makes things spin (c) stores a little charge (d) lets current go one way
  15. 15.True or false: a motor turns a fan or wheels. (a) True (b) False
  16. 16.What does a motor do? (a) blows if current is high (b) turns a fan or wheels (c) stores a little charge (d) senses how hot it is
  17. 17.True or false: a resistor makes a beeping sound. (a) True (b) False
  18. 18.What does a buzzer do? (a) beeps for an alarm (b) senses how hot it is (c) makes things spin (d) smooths a wobbly supply
  19. 19.True or false: a resistor limits the current. (a) False (b) True
  20. 20.What does a transistor do? (a) limits the current (b) boosts a small signal (c) lets current go one way (d) makes a beeping sound
  21. 21.🧩 Which component smooths a wobbly supply? (a) fuse (b) resistor (c) buzzer (d) capacitor
  22. 22.What does a capacitor do? (a) senses how hot it is (b) smooths a wobbly supply (c) limits the current (d) boosts a small signal
  23. 23.True or false: an LDR has coloured bands. (a) False (b) True
  24. 24.True or false: a resistor has coloured bands. (a) False (b) True
  25. 25.🧩 Which component has coloured bands? (a) fuse (b) potentiometer (c) resistor (d) LDR
  26. 26.🧩 Which component beeps for an alarm? (a) potentiometer (b) buzzer (c) LED (d) motor
  27. 27.True or false: a capacitor boosts a small signal. (a) False (b) True
  28. 28.True or false: a capacitor senses how bright it is. (a) False (b) True
  29. 29.🧩 Which component senses how bright it is? (a) fuse (b) transistor (c) thermistor (d) LDR
  30. 30.What does a resistor do? (a) beeps for an alarm (b) glows using little power (c) smooths a wobbly supply (d) limits the current
  31. 31.What does an LDR do? (a) has coloured bands (b) senses how bright it is (c) blows if current is high (d) turns a fan or wheels
  32. 32.True or false: a buzzer makes a beeping sound. (a) True (b) False
  33. 33.🧩 Which component lets current go one way? (a) resistor (b) LED (c) buzzer (d) diode
  34. 34.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  35. 35.🧩 Which component makes a beeping sound? (a) potentiometer (b) motor (c) fuse (d) buzzer
  36. 36.🧩 Which component stores a little charge? (a) diode (b) potentiometer (c) capacitor (d) resistor
  37. 37.🧩 Which component senses how hot it is? (a) LED (b) diode (c) thermistor (d) resistor
  38. 38.🧩 Which component boosts a small signal? (a) potentiometer (b) transistor (c) resistor (d) LDR
  39. 39.True or false: an LED blows if current is high. (a) False (b) True
  40. 40.🧩 Which component turns a fan or wheels? (a) buzzer (b) motor (c) capacitor (d) potentiometer

Answer key

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

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