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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 336 · 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) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  2. 2.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  3. 3.What does a buzzer do? (a) senses how hot it is (b) blows if current is high (c) makes a beeping sound (d) glows using little power
  4. 4.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) thermistor (d) LED
  5. 5.True or false: a fuse boosts a small signal. (a) False (b) True
  6. 6.🧩 Which component lets current go one way? (a) fuse (b) LED (c) capacitor (d) diode
  7. 7.What does a motor do? (a) limits the current (b) is a resistance knob (c) makes things spin (d) senses how hot it is
  8. 8.True or false: a resistor makes things spin. (a) True (b) False
  9. 9.What does a fuse do? (a) has coloured bands (b) makes things spin (c) is a resistance knob (d) blows if current is high
  10. 10.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  11. 11.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) capacitor (d) LED
  12. 12.🧩 Which component blows if current is high? (a) capacitor (b) thermistor (c) fuse (d) motor
  13. 13.🧩 Which component glows using little power? (a) LDR (b) buzzer (c) LED (d) resistor
  14. 14.What does a diode do? (a) lets current go one way (b) stores a little charge (c) senses how bright it is (d) glows using little power
  15. 15.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  16. 16.🧩 Which component boosts a small signal? (a) buzzer (b) diode (c) transistor (d) LED
  17. 17.🧩 Which component limits the current? (a) transistor (b) resistor (c) buzzer (d) LED
  18. 18.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  19. 19.True or false: a buzzer makes a beeping sound. (a) False (b) True
  20. 20.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) resistor (d) diode
  21. 21.What does a thermistor do? (a) smooths a wobbly supply (b) blows if current is high (c) beeps for an alarm (d) senses how hot it is
  22. 22.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  23. 23.True or false: a fuse blows if current is high. (a) True (b) False
  24. 24.What does a potentiometer do? (a) limits the current (b) makes a beeping sound (c) is a resistance knob (d) stores a little charge
  25. 25.🧩 Which component smooths a wobbly supply? (a) motor (b) buzzer (c) capacitor (d) diode
  26. 26.True or false: a motor makes things spin. (a) False (b) True
  27. 27.What does an LED do? (a) lets current go one way (b) turns a fan or wheels (c) senses how bright it is (d) glows using little power
  28. 28.🧩 Which component makes a beeping sound? (a) thermistor (b) buzzer (c) transistor (d) resistor
  29. 29.What does a motor do? (a) senses how bright it is (b) has coloured bands (c) turns a fan or wheels (d) glows using little power
  30. 30.What does a capacitor do? (a) is a resistance knob (b) makes things spin (c) makes a beeping sound (d) smooths a wobbly supply
  31. 31.True or false: an LED smooths a wobbly supply. (a) False (b) True
  32. 32.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) diode (d) transistor
  33. 33.True or false: a motor turns a fan or wheels. (a) True (b) False
  34. 34.🧩 Which component senses how hot it is? (a) thermistor (b) potentiometer (c) transistor (d) resistor
  35. 35.True or false: a buzzer makes things spin. (a) True (b) False
  36. 36.What does a transistor do? (a) boosts a small signal (b) glows using little power (c) lets current go one way (d) senses how bright it is
  37. 37.True or false: a thermistor glows using little power. (a) True (b) False
  38. 38.What does a capacitor do? (a) lets current go one way (b) senses how bright it is (c) glows using little power (d) stores a little charge
  39. 39.🧩 Which component has coloured bands? (a) LED (b) resistor (c) LDR (d) motor
  40. 40.True or false: a capacitor smooths a wobbly supply. (a) False (b) True

Answer key

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

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