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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 288 · 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) senses how bright it is (b) makes a beeping sound (c) limits the current (d) smooths a wobbly supply
  2. 2.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  3. 3.🧩 Which component glows using little power? (a) motor (b) LED (c) capacitor (d) thermistor
  4. 4.True or false: an LED glows using little power. (a) False (b) True
  5. 5.🧩 Which component lets current go one way? (a) fuse (b) buzzer (c) diode (d) potentiometer
  6. 6.🧩 Which component limits the current? (a) transistor (b) capacitor (c) LDR (d) resistor
  7. 7.What does a capacitor do? (a) limits the current (b) stores a little charge (c) makes things spin (d) blows if current is high
  8. 8.True or false: a resistor limits the current. (a) False (b) True
  9. 9.🧩 Which component makes things spin? (a) thermistor (b) motor (c) potentiometer (d) LED
  10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  11. 11.What does a diode do? (a) glows using little power (b) blows if current is high (c) lets current go one way (d) is a resistance knob
  12. 12.What does a thermistor do? (a) stores a little charge (b) senses how hot it is (c) limits the current (d) makes a beeping sound
  13. 13.🧩 Which component boosts a small signal? (a) capacitor (b) motor (c) transistor (d) diode
  14. 14.What does an LDR do? (a) boosts a small signal (b) blows if current is high (c) senses how bright it is (d) makes things spin
  15. 15.What does a transistor do? (a) makes a beeping sound (b) blows if current is high (c) boosts a small signal (d) stores a little charge
  16. 16.What does a resistor do? (a) blows if current is high (b) beeps for an alarm (c) has coloured bands (d) boosts a small signal
  17. 17.🧩 Which component makes a beeping sound? (a) LDR (b) buzzer (c) fuse (d) LED
  18. 18.🧩 Which component is a resistance knob? (a) buzzer (b) LED (c) potentiometer (d) fuse
  19. 19.🧩 Which component senses how hot it is? (a) thermistor (b) potentiometer (c) LED (d) transistor
  20. 20.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  21. 21.🧩 Which component stores a little charge? (a) LED (b) buzzer (c) capacitor (d) resistor
  22. 22.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) diode (d) LDR
  23. 23.🧩 Which component senses how bright it is? (a) thermistor (b) buzzer (c) LDR (d) resistor
  24. 24.🧩 Which component has coloured bands? (a) transistor (b) fuse (c) resistor (d) LED
  25. 25.🧩 Which component smooths a wobbly supply? (a) fuse (b) buzzer (c) capacitor (d) diode
  26. 26.True or false: a capacitor stores a little charge. (a) True (b) False
  27. 27.True or false: a buzzer beeps for an alarm. (a) True (b) False
  28. 28.🧩 Which component turns a fan or wheels? (a) diode (b) potentiometer (c) thermistor (d) motor
  29. 29.True or false: a potentiometer is a resistance knob. (a) False (b) True
  30. 30.True or false: a potentiometer boosts a small signal. (a) False (b) True
  31. 31.True or false: a capacitor senses how bright it is. (a) True (b) False
  32. 32.True or false: an LDR turns a fan or wheels. (a) False (b) True
  33. 33.What does an LED do? (a) has coloured bands (b) stores a little charge (c) glows using little power (d) beeps for an alarm
  34. 34.What does a motor do? (a) makes things spin (b) limits the current (c) lets current go one way (d) is a resistance knob
  35. 35.True or false: a diode lets current go one way. (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: an LDR stores a little charge. (a) True (b) False
  38. 38.What does a potentiometer do? (a) blows if current is high (b) smooths a wobbly supply (c) is a resistance knob (d) senses how bright it is
  39. 39.What does a buzzer do? (a) turns a fan or wheels (b) is a resistance knob (c) boosts a small signal (d) makes a beeping sound
  40. 40.What does a fuse do? (a) stores a little charge (b) makes a beeping sound (c) has coloured bands (d) blows if current is high

Answer key

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

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