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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 624 · 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.What does a capacitor do? (a) has coloured bands (b) makes things spin (c) smooths a wobbly supply (d) beeps for an alarm
  2. 2.What does an LED do? (a) makes things spin (b) smooths a wobbly supply (c) glows using little power (d) has coloured bands
  3. 3.🧩 Which component senses how bright it is? (a) buzzer (b) LED (c) fuse (d) LDR
  4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  6. 6.🧩 Which component senses how hot it is? (a) buzzer (b) LDR (c) thermistor (d) diode
  7. 7.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  8. 8.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) LDR (d) transistor
  9. 9.True or false: a capacitor senses how bright it is. (a) False (b) True
  10. 10.What does a motor do? (a) makes things spin (b) is a resistance knob (c) boosts a small signal (d) beeps for an alarm
  11. 11.True or false: an LDR makes a beeping sound. (a) False (b) True
  12. 12.🧩 Which component is a resistance knob? (a) resistor (b) capacitor (c) potentiometer (d) transistor
  13. 13.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) beeps for an alarm (d) makes things spin
  14. 14.True or false: a resistor has coloured bands. (a) True (b) False
  15. 15.🧩 Which component beeps for an alarm? (a) LED (b) buzzer (c) LDR (d) thermistor
  16. 16.True or false: a thermistor is a resistance knob. (a) False (b) True
  17. 17.🧩 Which component turns a fan or wheels? (a) potentiometer (b) LDR (c) buzzer (d) motor
  18. 18.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) transistor (c) LED (d) capacitor
  19. 19.True or false: a thermistor senses how hot it is. (a) True (b) False
  20. 20.True or false: a motor beeps for an alarm. (a) True (b) False
  21. 21.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) glows using little power (d) blows if current is high
  22. 22.What does a fuse do? (a) blows if current is high (b) senses how bright it is (c) has coloured bands (d) makes a beeping sound
  23. 23.What does a resistor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) has coloured bands (d) senses how bright it is
  24. 24.🧩 Which component lets current go one way? (a) resistor (b) diode (c) transistor (d) LED
  25. 25.True or false: a motor makes things spin. (a) False (b) True
  26. 26.🧩 Which component limits the current? (a) resistor (b) LED (c) thermistor (d) motor
  27. 27.What does a potentiometer do? (a) has coloured bands (b) limits the current (c) is a resistance knob (d) stores a little charge
  28. 28.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) thermistor (d) fuse
  29. 29.🧩 Which component makes things spin? (a) capacitor (b) motor (c) LED (d) thermistor
  30. 30.What does a thermistor do? (a) is a resistance knob (b) makes a beeping sound (c) senses how hot it is (d) blows if current is high
  31. 31.🧩 Which component glows using little power? (a) buzzer (b) transistor (c) LED (d) resistor
  32. 32.What does a resistor do? (a) glows using little power (b) smooths a wobbly supply (c) limits the current (d) beeps for an alarm
  33. 33.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  34. 34.What does a motor do? (a) lets current go one way (b) smooths a wobbly supply (c) turns a fan or wheels (d) has coloured bands
  35. 35.True or false: a fuse blows if current is high. (a) False (b) True
  36. 36.True or false: a capacitor limits the current. (a) False (b) True
  37. 37.True or false: an LDR limits the current. (a) False (b) True
  38. 38.True or false: a thermistor lets current go one way. (a) True (b) False
  39. 39.True or false: a fuse beeps for an alarm. (a) True (b) False
  40. 40.True or false: a thermistor senses how bright it is. (a) True (b) False

Answer key

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

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