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Electronics Worksheet: Electronic Components

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

Answer key

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

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