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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 538 · 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.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  2. 2.🧩 Which component stores a little charge? (a) buzzer (b) thermistor (c) capacitor (d) diode
  3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  4. 4.What does an LDR do? (a) senses how hot it is (b) lets current go one way (c) glows using little power (d) senses how bright it is
  5. 5.What does a diode do? (a) smooths a wobbly supply (b) stores a little charge (c) lets current go one way (d) limits the current
  6. 6.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  7. 7.True or false: an LED has coloured bands. (a) False (b) True
  8. 8.What does a potentiometer do? (a) makes a beeping sound (b) turns a fan or wheels (c) makes things spin (d) is a resistance knob
  9. 9.True or false: a thermistor senses how hot it is. (a) True (b) False
  10. 10.What does a capacitor do? (a) beeps for an alarm (b) senses how bright it is (c) lets current go one way (d) smooths a wobbly supply
  11. 11.True or false: a transistor blows if current is high. (a) False (b) True
  12. 12.What does a resistor do? (a) glows using little power (b) limits the current (c) makes a beeping sound (d) boosts a small signal
  13. 13.🧩 Which component has coloured bands? (a) LDR (b) motor (c) thermistor (d) resistor
  14. 14.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  15. 15.True or false: a capacitor stores a little charge. (a) False (b) True
  16. 16.🧩 Which component smooths a wobbly supply? (a) buzzer (b) potentiometer (c) capacitor (d) transistor
  17. 17.True or false: a fuse blows if current is high. (a) True (b) False
  18. 18.True or false: a resistor has coloured bands. (a) False (b) True
  19. 19.True or false: an LDR boosts a small signal. (a) True (b) False
  20. 20.True or false: an LDR limits the current. (a) False (b) True
  21. 21.🧩 Which component glows using little power? (a) LED (b) motor (c) capacitor (d) transistor
  22. 22.🧩 Which component beeps for an alarm? (a) thermistor (b) resistor (c) buzzer (d) potentiometer
  23. 23.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) resistor (d) LDR
  24. 24.🧩 Which component limits the current? (a) LED (b) motor (c) fuse (d) resistor
  25. 25.What does a capacitor do? (a) limits the current (b) stores a little charge (c) makes a beeping sound (d) senses how bright it is
  26. 26.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) thermistor (d) fuse
  27. 27.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) smooths a wobbly supply (d) blows if current is high
  28. 28.True or false: an LDR senses how bright it is. (a) False (b) True
  29. 29.What does an LED do? (a) boosts a small signal (b) limits the current (c) glows using little power (d) is a resistance knob
  30. 30.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) senses how bright it is (d) has coloured bands
  31. 31.What does a buzzer do? (a) makes things spin (b) limits the current (c) beeps for an alarm (d) senses how hot it is
  32. 32.What does a motor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) makes things spin (d) is a resistance knob
  33. 33.🧩 Which component boosts a small signal? (a) capacitor (b) potentiometer (c) transistor (d) thermistor
  34. 34.🧩 Which component is a resistance knob? (a) transistor (b) buzzer (c) resistor (d) potentiometer
  35. 35.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) diode (d) transistor
  36. 36.True or false: an LDR lets current go one way. (a) False (b) True
  37. 37.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) LED (d) resistor
  38. 38.True or false: a motor makes things spin. (a) True (b) False
  39. 39.True or false: a fuse senses how hot it is. (a) False (b) True
  40. 40.True or false: a buzzer blows if current is high. (a) True (b) False

Answer key

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

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