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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 666 · 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) an LED (b) a resistor (c) a motor (d) a fuse
  2. 2.What does an LDR do? (a) blows if current is high (b) stores a little charge (c) senses how bright it is (d) limits the current
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  4. 4.🧩 Which component senses how hot it is? (a) LDR (b) LED (c) thermistor (d) buzzer
  5. 5.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) has coloured bands (d) smooths a wobbly supply
  6. 6.True or false: a buzzer beeps for an alarm. (a) False (b) True
  7. 7.🧩 Which component makes things spin? (a) capacitor (b) motor (c) diode (d) potentiometer
  8. 8.What does a diode do? (a) lets current go one way (b) blows if current is high (c) glows using little power (d) makes a beeping sound
  9. 9.🧩 Which component beeps for an alarm? (a) LED (b) diode (c) buzzer (d) resistor
  10. 10.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  11. 11.What does a transistor do? (a) lets current go one way (b) is a resistance knob (c) limits the current (d) boosts a small signal
  12. 12.True or false: a fuse blows if current is high. (a) True (b) False
  13. 13.🧩 Which component limits the current? (a) LED (b) thermistor (c) buzzer (d) resistor
  14. 14.True or false: a buzzer senses how bright it is. (a) False (b) True
  15. 15.True or false: an LDR smooths a wobbly supply. (a) True (b) False
  16. 16.True or false: a capacitor stores a little charge. (a) True (b) False
  17. 17.True or false: a thermistor senses how hot it is. (a) True (b) False
  18. 18.True or false: a capacitor beeps for an alarm. (a) False (b) True
  19. 19.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  20. 20.What does a resistor do? (a) blows if current is high (b) smooths a wobbly supply (c) limits the current (d) turns a fan or wheels
  21. 21.🧩 Which component boosts a small signal? (a) LDR (b) fuse (c) transistor (d) LED
  22. 22.What does an LED do? (a) senses how hot it is (b) senses how bright it is (c) stores a little charge (d) glows using little power
  23. 23.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) turns a fan or wheels (d) senses how bright it is
  24. 24.What does a buzzer do? (a) has coloured bands (b) senses how hot it is (c) makes a beeping sound (d) limits the current
  25. 25.True or false: a buzzer makes a beeping sound. (a) True (b) False
  26. 26.True or false: a resistor turns a fan or wheels. (a) False (b) True
  27. 27.🧩 Which component senses how bright it is? (a) buzzer (b) thermistor (c) LDR (d) LED
  28. 28.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) motor (d) transistor
  29. 29.🧩 Which component turns a fan or wheels? (a) LDR (b) capacitor (c) motor (d) potentiometer
  30. 30.🧩 Which component lets current go one way? (a) potentiometer (b) LED (c) diode (d) fuse
  31. 31.True or false: a potentiometer is a resistance knob. (a) True (b) False
  32. 32.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  33. 33.True or false: a resistor has coloured bands. (a) False (b) True
  34. 34.🧩 Which component is a resistance knob? (a) resistor (b) transistor (c) motor (d) potentiometer
  35. 35.🧩 Which component glows using little power? (a) LED (b) buzzer (c) motor (d) resistor
  36. 36.What does a resistor do? (a) has coloured bands (b) makes a beeping sound (c) is a resistance knob (d) smooths a wobbly supply
  37. 37.True or false: an LED glows using little power. (a) True (b) False
  38. 38.True or false: a thermistor senses how bright it is. (a) False (b) True
  39. 39.True or false: an LED is a resistance knob. (a) True (b) False
  40. 40.True or false: a thermistor lets current go one way. (a) True (b) False

Answer key

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

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