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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 470 · 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.True or false: a motor limits the current. (a) True (b) False
  2. 2.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  3. 3.What does an LDR do? (a) lets current go one way (b) senses how bright it is (c) beeps for an alarm (d) limits the current
  4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  5. 5.True or false: an LDR senses how bright it is. (a) True (b) False
  6. 6.What does a potentiometer do? (a) blows if current is high (b) boosts a small signal (c) makes a beeping sound (d) is a resistance knob
  7. 7.True or false: a thermistor senses how hot it is. (a) False (b) True
  8. 8.🧩 Which component has coloured bands? (a) motor (b) fuse (c) potentiometer (d) resistor
  9. 9.What does a capacitor do? (a) smooths a wobbly supply (b) senses how hot it is (c) senses how bright it is (d) blows if current is high
  10. 10.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) capacitor (d) resistor
  11. 11.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) diode (d) LED
  12. 12.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) LED (d) potentiometer
  13. 13.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  14. 14.True or false: a fuse boosts a small signal. (a) False (b) True
  15. 15.🧩 Which component makes things spin? (a) capacitor (b) fuse (c) motor (d) LED
  16. 16.True or false: a diode lets current go one way. (a) False (b) True
  17. 17.True or false: an LDR beeps for an alarm. (a) True (b) False
  18. 18.What does an LED do? (a) stores a little charge (b) glows using little power (c) senses how bright it is (d) senses how hot it is
  19. 19.True or false: an LDR stores a little charge. (a) False (b) True
  20. 20.What does a motor do? (a) senses how hot it is (b) stores a little charge (c) makes things spin (d) beeps for an alarm
  21. 21.True or false: a motor makes things spin. (a) True (b) False
  22. 22.🧩 Which component smooths a wobbly supply? (a) motor (b) transistor (c) buzzer (d) capacitor
  23. 23.What does a buzzer do? (a) boosts a small signal (b) has coloured bands (c) makes a beeping sound (d) makes things spin
  24. 24.True or false: a potentiometer is a resistance knob. (a) False (b) True
  25. 25.🧩 Which component blows if current is high? (a) buzzer (b) LDR (c) resistor (d) fuse
  26. 26.🧩 Which component lets current go one way? (a) transistor (b) LED (c) diode (d) resistor
  27. 27.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) fuse (d) LDR
  28. 28.What does a resistor do? (a) has coloured bands (b) is a resistance knob (c) blows if current is high (d) makes things spin
  29. 29.True or false: a buzzer beeps for an alarm. (a) False (b) True
  30. 30.🧩 Which component senses how bright it is? (a) capacitor (b) resistor (c) diode (d) LDR
  31. 31.What does a capacitor do? (a) makes things spin (b) boosts a small signal (c) stores a little charge (d) blows if current is high
  32. 32.What does a fuse do? (a) glows using little power (b) turns a fan or wheels (c) has coloured bands (d) blows if current is high
  33. 33.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) capacitor (d) buzzer
  34. 34.🧩 Which component limits the current? (a) LED (b) potentiometer (c) resistor (d) thermistor
  35. 35.What does a transistor do? (a) smooths a wobbly supply (b) is a resistance knob (c) glows using little power (d) boosts a small signal
  36. 36.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
  37. 37.True or false: a fuse blows if current is high. (a) True (b) False
  38. 38.What does a diode do? (a) lets current go one way (b) blows if current is high (c) boosts a small signal (d) limits the current
  39. 39.🧩 Which component turns a fan or wheels? (a) LDR (b) LED (c) motor (d) fuse
  40. 40.True or false: a capacitor makes things spin. (a) True (b) False

Answer key

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

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