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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 610 · 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 hot it is (b) lets current go one way (c) turns a fan or wheels (d) senses how bright it is
  2. 2.🧩 Which component limits the current? (a) buzzer (b) LED (c) resistor (d) fuse
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  4. 4.🧩 Which component is a resistance knob? (a) capacitor (b) resistor (c) potentiometer (d) transistor
  5. 5.True or false: a motor turns a fan or wheels. (a) False (b) True
  6. 6.True or false: a diode lets current go one way. (a) False (b) True
  7. 7.What does a fuse do? (a) glows using little power (b) senses how bright it is (c) smooths a wobbly supply (d) blows if current is high
  8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  9. 9.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) thermistor (d) LED
  10. 10.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  11. 11.True or false: an LED glows using little power. (a) False (b) True
  12. 12.What does a buzzer do? (a) blows if current is high (b) limits the current (c) makes a beeping sound (d) lets current go one way
  13. 13.🧩 Which component glows using little power? (a) LED (b) thermistor (c) transistor (d) buzzer
  14. 14.What does a resistor do? (a) limits the current (b) smooths a wobbly supply (c) boosts a small signal (d) senses how bright it is
  15. 15.True or false: a diode is a resistance knob. (a) True (b) False
  16. 16.What does a transistor do? (a) blows if current is high (b) senses how bright it is (c) makes things spin (d) boosts a small signal
  17. 17.What does a motor do? (a) makes things spin (b) stores a little charge (c) lets current go one way (d) has coloured bands
  18. 18.🧩 Which component beeps for an alarm? (a) diode (b) fuse (c) buzzer (d) LED
  19. 19.True or false: a potentiometer has coloured bands. (a) True (b) False
  20. 20.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  21. 21.What does a capacitor do? (a) lets current go one way (b) smooths a wobbly supply (c) blows if current is high (d) makes a beeping sound
  22. 22.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) resistor (d) LDR
  23. 23.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) capacitor (d) buzzer
  24. 24.🧩 Which component smooths a wobbly supply? (a) LDR (b) resistor (c) capacitor (d) motor
  25. 25.True or false: an LED makes a beeping sound. (a) True (b) False
  26. 26.What does an LDR do? (a) smooths a wobbly supply (b) boosts a small signal (c) makes a beeping sound (d) senses how bright it is
  27. 27.True or false: a resistor stores a little charge. (a) True (b) False
  28. 28.True or false: a resistor limits the current. (a) True (b) False
  29. 29.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  30. 30.True or false: a buzzer lets current go one way. (a) True (b) False
  31. 31.True or false: a fuse blows if current is high. (a) True (b) False
  32. 32.True or false: an LDR senses how bright it is. (a) False (b) True
  33. 33.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) senses how hot it is (d) turns a fan or wheels
  34. 34.🧩 Which component blows if current is high? (a) capacitor (b) motor (c) resistor (d) fuse
  35. 35.What does an LED do? (a) turns a fan or wheels (b) senses how hot it is (c) glows using little power (d) beeps for an alarm
  36. 36.🧩 Which component has coloured bands? (a) LDR (b) motor (c) resistor (d) diode
  37. 37.True or false: a buzzer makes a beeping sound. (a) True (b) False
  38. 38.What does a diode do? (a) stores a little charge (b) is a resistance knob (c) lets current go one way (d) glows using little power
  39. 39.True or false: an LED turns a fan or wheels. (a) True (b) False
  40. 40.🧩 Which component makes things spin? (a) resistor (b) LED (c) capacitor (d) motor

Answer key

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

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