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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 228 · 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 smooths a wobbly supply? (a) potentiometer (b) buzzer (c) fuse (d) capacitor
  2. 2.What does a resistor do? (a) turns a fan or wheels (b) is a resistance knob (c) has coloured bands (d) blows if current is high
  3. 3.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) resistor (d) LED
  4. 4.🧩 Which component turns a fan or wheels? (a) potentiometer (b) buzzer (c) motor (d) resistor
  5. 5.🧩 Which component senses how bright it is? (a) fuse (b) transistor (c) LED (d) LDR
  6. 6.What does a motor do? (a) makes things spin (b) boosts a small signal (c) smooths a wobbly supply (d) stores a little charge
  7. 7.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) buzzer (d) LDR
  8. 8.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) LED (d) capacitor
  9. 9.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
  10. 10.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  11. 11.True or false: a resistor has coloured bands. (a) True (b) False
  12. 12.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) LED (d) transistor
  13. 13.What does a capacitor do? (a) has coloured bands (b) stores a little charge (c) senses how bright it is (d) is a resistance knob
  14. 14.🧩 Which component blows if current is high? (a) capacitor (b) diode (c) fuse (d) potentiometer
  15. 15.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  16. 16.What does a diode do? (a) has coloured bands (b) smooths a wobbly supply (c) lets current go one way (d) limits the current
  17. 17.True or false: a capacitor stores a little charge. (a) False (b) True
  18. 18.What does a fuse do? (a) blows if current is high (b) beeps for an alarm (c) lets current go one way (d) senses how hot it is
  19. 19.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  20. 20.What does a potentiometer do? (a) is a resistance knob (b) limits the current (c) stores a little charge (d) senses how bright it is
  21. 21.True or false: an LED glows using little power. (a) False (b) True
  22. 22.True or false: a buzzer beeps for an alarm. (a) False (b) True
  23. 23.True or false: a potentiometer is a resistance knob. (a) True (b) False
  24. 24.True or false: a diode blows if current is high. (a) False (b) True
  25. 25.What does a buzzer do? (a) makes a beeping sound (b) stores a little charge (c) senses how bright it is (d) lets current go one way
  26. 26.True or false: an LED has coloured bands. (a) False (b) True
  27. 27.🧩 Which component makes things spin? (a) resistor (b) motor (c) LED (d) diode
  28. 28.True or false: a motor makes things spin. (a) False (b) True
  29. 29.What does a resistor do? (a) senses how hot it is (b) makes a beeping sound (c) limits the current (d) glows using little power
  30. 30.What does a motor do? (a) makes a beeping sound (b) senses how hot it is (c) has coloured bands (d) turns a fan or wheels
  31. 31.True or false: a thermistor senses how hot it is. (a) True (b) False
  32. 32.🧩 Which component limits the current? (a) buzzer (b) capacitor (c) potentiometer (d) resistor
  33. 33.True or false: a motor turns a fan or wheels. (a) False (b) True
  34. 34.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  35. 35.True or false: an LED is a resistance knob. (a) True (b) False
  36. 36.True or false: an LDR senses how bright it is. (a) False (b) True
  37. 37.True or false: a resistor senses how hot it is. (a) True (b) False
  38. 38.True or false: a resistor lets current go one way. (a) True (b) False
  39. 39.True or false: an LED stores a little charge. (a) False (b) True
  40. 40.What does an LED do? (a) smooths a wobbly supply (b) has coloured bands (c) turns a fan or wheels (d) glows using little power

Answer key

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

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