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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 494 · 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.True or false: a motor turns a fan or wheels. (a) False (b) True
  2. 2.🧩 Which component limits the current? (a) LED (b) LDR (c) resistor (d) thermistor
  3. 3.True or false: an LED glows using little power. (a) False (b) True
  4. 4.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  5. 5.🧩 Which component senses how bright it is? (a) fuse (b) LDR (c) capacitor (d) LED
  6. 6.🧩 Which component smooths a wobbly supply? (a) LDR (b) fuse (c) thermistor (d) capacitor
  7. 7.True or false: a thermistor limits the current. (a) False (b) True
  8. 8.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  9. 9.What does a diode do? (a) makes a beeping sound (b) stores a little charge (c) glows using little power (d) lets current go one way
  10. 10.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) beeps for an alarm (d) blows if current is high
  11. 11.🧩 Which component lets current go one way? (a) diode (b) LDR (c) capacitor (d) buzzer
  12. 12.True or false: a resistor limits the current. (a) False (b) True
  13. 13.True or false: a motor stores a little charge. (a) False (b) True
  14. 14.🧩 Which component has coloured bands? (a) potentiometer (b) capacitor (c) resistor (d) fuse
  15. 15.What does a motor do? (a) limits the current (b) boosts a small signal (c) makes things spin (d) stores a little charge
  16. 16.True or false: an LDR turns a fan or wheels. (a) True (b) False
  17. 17.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  18. 18.What does a potentiometer do? (a) limits the current (b) smooths a wobbly supply (c) senses how bright it is (d) is a resistance knob
  19. 19.🧩 Which component blows if current is high? (a) thermistor (b) motor (c) fuse (d) buzzer
  20. 20.What does a thermistor do? (a) blows if current is high (b) is a resistance knob (c) senses how hot it is (d) turns a fan or wheels
  21. 21.🧩 Which component glows using little power? (a) capacitor (b) LED (c) buzzer (d) LDR
  22. 22.🧩 Which component stores a little charge? (a) diode (b) fuse (c) motor (d) capacitor
  23. 23.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) motor (d) capacitor
  24. 24.🧩 Which component makes things spin? (a) capacitor (b) motor (c) transistor (d) fuse
  25. 25.True or false: a capacitor stores a little charge. (a) True (b) False
  26. 26.What does a fuse do? (a) blows if current is high (b) beeps for an alarm (c) makes things spin (d) smooths a wobbly supply
  27. 27.True or false: an LDR senses how bright it is. (a) True (b) False
  28. 28.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) beeps for an alarm (d) senses how hot it is
  29. 29.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) resistor (d) transistor
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  31. 31.What does a buzzer do? (a) lets current go one way (b) blows if current is high (c) stores a little charge (d) beeps for an alarm
  32. 32.True or false: a motor makes things spin. (a) False (b) True
  33. 33.True or false: a diode lets current go one way. (a) False (b) True
  34. 34.True or false: a diode stores a little charge. (a) False (b) True
  35. 35.What does a capacitor do? (a) smooths a wobbly supply (b) limits the current (c) glows using little power (d) turns a fan or wheels
  36. 36.🧩 Which component is a resistance knob? (a) fuse (b) buzzer (c) thermistor (d) potentiometer
  37. 37.True or false: an LED makes a beeping sound. (a) False (b) True
  38. 38.What does an LED do? (a) beeps for an alarm (b) makes a beeping sound (c) limits the current (d) glows using little power
  39. 39.True or false: a transistor stores a little charge. (a) True (b) False
  40. 40.True or false: a fuse blows if current is high. (a) False (b) True

Answer key

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

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