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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 694 · 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) an LED (c) a resistor (d) a motor
  2. 2.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) diode (d) fuse
  3. 3.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) motor (d) resistor
  4. 4.🧩 Which component smooths a wobbly supply? (a) diode (b) motor (c) buzzer (d) capacitor
  5. 5.What does a resistor do? (a) makes a beeping sound (b) senses how bright it is (c) has coloured bands (d) senses how hot it is
  6. 6.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) turns a fan or wheels (d) limits the current
  7. 7.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  8. 8.What does an LDR do? (a) limits the current (b) beeps for an alarm (c) senses how bright it is (d) blows if current is high
  9. 9.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) fuse (d) LDR
  10. 10.What does a capacitor do? (a) blows if current is high (b) senses how hot it is (c) stores a little charge (d) senses how bright it is
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  12. 12.🧩 Which component lets current go one way? (a) LED (b) resistor (c) diode (d) fuse
  13. 13.What does a buzzer do? (a) lets current go one way (b) turns a fan or wheels (c) beeps for an alarm (d) limits the current
  14. 14.True or false: a thermistor senses how hot it is. (a) True (b) False
  15. 15.True or false: a motor is a resistance knob. (a) True (b) False
  16. 16.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) capacitor (d) fuse
  17. 17.True or false: a motor makes things spin. (a) True (b) False
  18. 18.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) buzzer (d) diode
  19. 19.True or false: a fuse lets current go one way. (a) False (b) True
  20. 20.🧩 Which component limits the current? (a) resistor (b) capacitor (c) motor (d) transistor
  21. 21.True or false: a thermistor limits the current. (a) False (b) True
  22. 22.What does a transistor do? (a) is a resistance knob (b) makes a beeping sound (c) has coloured bands (d) boosts a small signal
  23. 23.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  24. 24.🧩 Which component boosts a small signal? (a) capacitor (b) fuse (c) transistor (d) motor
  25. 25.What does a diode do? (a) has coloured bands (b) senses how hot it is (c) lets current go one way (d) makes things spin
  26. 26.🧩 Which component blows if current is high? (a) LED (b) LDR (c) capacitor (d) fuse
  27. 27.True or false: a capacitor glows using little power. (a) True (b) False
  28. 28.True or false: a thermistor has coloured bands. (a) False (b) True
  29. 29.True or false: a buzzer is a resistance knob. (a) True (b) False
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  31. 31.What does a thermistor do? (a) limits the current (b) has coloured bands (c) senses how hot it is (d) lets current go one way
  32. 32.🧩 Which component glows using little power? (a) buzzer (b) motor (c) resistor (d) LED
  33. 33.🧩 Which component makes things spin? (a) potentiometer (b) LDR (c) motor (d) capacitor
  34. 34.True or false: a transistor boosts a small signal. (a) True (b) False
  35. 35.What does a motor do? (a) senses how hot it is (b) stores a little charge (c) makes a beeping sound (d) makes things spin
  36. 36.True or false: a capacitor stores a little charge. (a) False (b) True
  37. 37.True or false: a motor turns a fan or wheels. (a) True (b) False
  38. 38.What does a potentiometer do? (a) is a resistance knob (b) lets current go one way (c) makes a beeping sound (d) blows if current is high
  39. 39.What does a buzzer do? (a) is a resistance knob (b) makes a beeping sound (c) limits the current (d) senses how bright it is
  40. 40.True or false: a buzzer senses how bright it is. (a) True (b) False

Answer key

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

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