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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 480 · 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.What does a motor do? (a) senses how bright it is (b) limits the current (c) has coloured bands (d) turns a fan or wheels
  2. 2.True or false: a capacitor makes things spin. (a) True (b) False
  3. 3.What does a capacitor do? (a) boosts a small signal (b) smooths a wobbly supply (c) makes things spin (d) blows if current is high
  4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
  5. 5.🧩 Which component makes a beeping sound? (a) fuse (b) transistor (c) LED (d) buzzer
  6. 6.True or false: a capacitor senses how bright it is. (a) True (b) False
  7. 7.True or false: a transistor is a resistance knob. (a) True (b) False
  8. 8.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LDR (c) buzzer (d) diode
  9. 9.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) diode (d) LED
  10. 10.What does an LDR do? (a) smooths a wobbly supply (b) lets current go one way (c) senses how bright it is (d) blows if current is high
  11. 11.🧩 Which component makes things spin? (a) capacitor (b) thermistor (c) motor (d) fuse
  12. 12.What does a transistor do? (a) is a resistance knob (b) turns a fan or wheels (c) boosts a small signal (d) blows if current is high
  13. 13.True or false: a buzzer beeps for an alarm. (a) False (b) True
  14. 14.What does a potentiometer do? (a) has coloured bands (b) senses how bright it is (c) boosts a small signal (d) is a resistance knob
  15. 15.What does an LED do? (a) stores a little charge (b) senses how bright it is (c) boosts a small signal (d) glows using little power
  16. 16.🧩 Which component limits the current? (a) diode (b) capacitor (c) resistor (d) buzzer
  17. 17.True or false: a fuse stores a little charge. (a) True (b) False
  18. 18.What does a resistor do? (a) stores a little charge (b) limits the current (c) senses how hot it is (d) beeps for an alarm
  19. 19.True or false: a transistor smooths a wobbly supply. (a) True (b) False
  20. 20.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  21. 21.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) motor (d) transistor
  22. 22.What does a buzzer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) blows if current is high (d) glows using little power
  23. 23.🧩 Which component blows if current is high? (a) diode (b) resistor (c) fuse (d) buzzer
  24. 24.True or false: an LED beeps for an alarm. (a) True (b) False
  25. 25.🧩 Which component senses how bright it is? (a) fuse (b) diode (c) capacitor (d) LDR
  26. 26.True or false: a resistor limits the current. (a) False (b) True
  27. 27.True or false: a motor limits the current. (a) False (b) True
  28. 28.🧩 Which component is a resistance knob? (a) buzzer (b) LDR (c) LED (d) potentiometer
  29. 29.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) senses how hot it is (d) makes things spin
  30. 30.🧩 Which component lets current go one way? (a) LDR (b) thermistor (c) diode (d) resistor
  31. 31.🧩 Which component boosts a small signal? (a) potentiometer (b) motor (c) LED (d) transistor
  32. 32.True or false: an LDR senses how bright it is. (a) True (b) False
  33. 33.🧩 Which component turns a fan or wheels? (a) LDR (b) potentiometer (c) capacitor (d) motor
  34. 34.🧩 Which component senses how hot it is? (a) thermistor (b) transistor (c) capacitor (d) LDR
  35. 35.True or false: a transistor turns a fan or wheels. (a) False (b) True
  36. 36.True or false: a transistor makes things spin. (a) True (b) False
  37. 37.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  38. 38.True or false: a resistor beeps for an alarm. (a) True (b) False
  39. 39.True or false: an LED glows using little power. (a) False (b) True
  40. 40.True or false: a buzzer makes a beeping sound. (a) False (b) True

Answer key

  1. turns a fan or wheels
  2. False
  3. smooths a wobbly supply
  4. a motor
  5. buzzer
  6. False
  7. False
  8. capacitor
  9. capacitor
  10. senses how bright it is
  11. motor
  12. boosts a small signal
  13. True
  14. is a resistance knob
  15. glows using little power
  16. resistor
  17. False
  18. limits the current
  19. False
  20. a buzzer
  21. resistor
  22. makes a beeping sound
  23. fuse
  24. False
  25. LDR
  26. True
  27. False
  28. potentiometer
  29. blows if current is high
  30. diode
  31. transistor
  32. True
  33. motor
  34. thermistor
  35. False
  36. False
  37. False
  38. False
  39. True
  40. True

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