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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 161 · 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 an LDR do? (a) stores a little charge (b) limits the current (c) senses how bright it is (d) smooths a wobbly supply
  2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  3. 3.True or false: a fuse blows if current is high. (a) False (b) True
  4. 4.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  5. 5.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) resistor (d) diode
  6. 6.🧩 Which component makes things spin? (a) LDR (b) LED (c) motor (d) thermistor
  7. 7.What does a diode do? (a) has coloured bands (b) lets current go one way (c) smooths a wobbly supply (d) limits the current
  8. 8.🧩 Which component turns a fan or wheels? (a) motor (b) resistor (c) fuse (d) buzzer
  9. 9.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  10. 10.🧩 Which component lets current go one way? (a) motor (b) capacitor (c) LDR (d) diode
  11. 11.True or false: a resistor has coloured bands. (a) True (b) False
  12. 12.What does a resistor do? (a) turns a fan or wheels (b) blows if current is high (c) limits the current (d) boosts a small signal
  13. 13.🧩 Which component beeps for an alarm? (a) fuse (b) capacitor (c) LDR (d) buzzer
  14. 14.True or false: a buzzer limits the current. (a) False (b) True
  15. 15.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  16. 16.🧩 Which component has coloured bands? (a) capacitor (b) potentiometer (c) resistor (d) buzzer
  17. 17.🧩 Which component glows using little power? (a) buzzer (b) thermistor (c) LED (d) capacitor
  18. 18.True or false: a diode makes things spin. (a) True (b) False
  19. 19.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) fuse (d) diode
  20. 20.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) resistor (d) diode
  21. 21.True or false: an LED blows if current is high. (a) False (b) True
  22. 22.True or false: a motor makes things spin. (a) False (b) True
  23. 23.True or false: a motor glows using little power. (a) True (b) False
  24. 24.True or false: a motor is a resistance knob. (a) False (b) True
  25. 25.True or false: a buzzer beeps for an alarm. (a) True (b) False
  26. 26.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) has coloured bands (d) beeps for an alarm
  27. 27.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  28. 28.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) is a resistance knob (d) lets current go one way
  29. 29.What does a motor do? (a) makes things spin (b) senses how hot it is (c) blows if current is high (d) makes a beeping sound
  30. 30.What does a fuse do? (a) stores a little charge (b) is a resistance knob (c) makes things spin (d) blows if current is high
  31. 31.True or false: an LDR beeps for an alarm. (a) True (b) False
  32. 32.🧩 Which component boosts a small signal? (a) LED (b) fuse (c) transistor (d) resistor
  33. 33.True or false: a potentiometer senses how bright it is. (a) True (b) False
  34. 34.What does a potentiometer do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) is a resistance knob (d) stores a little charge
  35. 35.True or false: a motor turns a fan or wheels. (a) False (b) True
  36. 36.True or false: a diode glows using little power. (a) True (b) False
  37. 37.True or false: a capacitor lets current go one way. (a) False (b) True
  38. 38.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) makes things spin (d) senses how hot it is
  39. 39.What does a transistor do? (a) boosts a small signal (b) beeps for an alarm (c) blows if current is high (d) senses how hot it is
  40. 40.True or false: a resistor limits the current. (a) False (b) True

Answer key

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

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