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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 676 · 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 part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  2. 2.What does a thermistor do? (a) stores a little charge (b) smooths a wobbly supply (c) senses how bright it is (d) senses how hot it is
  3. 3.🧩 Which component glows using little power? (a) capacitor (b) resistor (c) fuse (d) LED
  4. 4.What does an LED do? (a) senses how bright it is (b) blows if current is high (c) glows using little power (d) smooths a wobbly supply
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  6. 6.What does a buzzer do? (a) stores a little charge (b) limits the current (c) smooths a wobbly supply (d) beeps for an alarm
  7. 7.What does a transistor do? (a) smooths a wobbly supply (b) has coloured bands (c) stores a little charge (d) boosts a small signal
  8. 8.🧩 Which component makes things spin? (a) resistor (b) fuse (c) capacitor (d) motor
  9. 9.🧩 Which component stores a little charge? (a) fuse (b) diode (c) capacitor (d) resistor
  10. 10.What does a fuse do? (a) senses how bright it is (b) boosts a small signal (c) blows if current is high (d) smooths a wobbly supply
  11. 11.True or false: an LED glows using little power. (a) False (b) True
  12. 12.True or false: a resistor has coloured bands. (a) False (b) True
  13. 13.True or false: a diode is a resistance knob. (a) True (b) False
  14. 14.True or false: a capacitor stores a little charge. (a) False (b) True
  15. 15.True or false: a buzzer makes a beeping sound. (a) True (b) False
  16. 16.What does a potentiometer do? (a) turns a fan or wheels (b) beeps for an alarm (c) makes a beeping sound (d) is a resistance knob
  17. 17.True or false: a buzzer beeps for an alarm. (a) True (b) False
  18. 18.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) thermistor (d) potentiometer
  19. 19.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
  20. 20.🧩 Which component is a resistance knob? (a) buzzer (b) motor (c) potentiometer (d) LDR
  21. 21.🧩 Which component boosts a small signal? (a) fuse (b) thermistor (c) diode (d) transistor
  22. 22.🧩 Which component smooths a wobbly supply? (a) buzzer (b) LED (c) resistor (d) capacitor
  23. 23.🧩 Which component senses how hot it is? (a) fuse (b) buzzer (c) motor (d) thermistor
  24. 24.True or false: an LDR senses how bright it is. (a) False (b) True
  25. 25.True or false: a motor makes things spin. (a) False (b) True
  26. 26.🧩 Which component has coloured bands? (a) potentiometer (b) thermistor (c) LDR (d) resistor
  27. 27.True or false: a buzzer lets current go one way. (a) False (b) True
  28. 28.What does a motor do? (a) makes a beeping sound (b) turns a fan or wheels (c) limits the current (d) lets current go one way
  29. 29.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  30. 30.🧩 Which component limits the current? (a) buzzer (b) resistor (c) fuse (d) potentiometer
  31. 31.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) resistor (d) buzzer
  32. 32.What does a capacitor do? (a) senses how bright it is (b) has coloured bands (c) stores a little charge (d) glows using little power
  33. 33.What does a buzzer do? (a) is a resistance knob (b) blows if current is high (c) makes a beeping sound (d) boosts a small signal
  34. 34.True or false: a diode lets current go one way. (a) True (b) False
  35. 35.🧩 Which component blows if current is high? (a) fuse (b) thermistor (c) LDR (d) diode
  36. 36.True or false: a resistor limits the current. (a) True (b) False
  37. 37.True or false: a fuse blows if current is high. (a) True (b) False
  38. 38.What does a resistor do? (a) has coloured bands (b) makes things spin (c) senses how hot it is (d) stores a little charge
  39. 39.What does a diode do? (a) senses how hot it is (b) makes a beeping sound (c) lets current go one way (d) stores a little charge
  40. 40.True or false: a fuse boosts a small signal. (a) True (b) False

Answer key

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

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