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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 357 · 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 component lets current go one way? (a) buzzer (b) LED (c) diode (d) capacitor
  2. 2.What does a capacitor do? (a) stores a little charge (b) beeps for an alarm (c) limits the current (d) lets current go one way
  3. 3.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  4. 4.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) motor (d) thermistor
  5. 5.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) limits the current (d) glows using little power
  6. 6.What does a motor do? (a) is a resistance knob (b) boosts a small signal (c) makes things spin (d) limits the current
  7. 7.🧩 Which component blows if current is high? (a) LDR (b) fuse (c) motor (d) LED
  8. 8.True or false: a motor turns a fan or wheels. (a) False (b) True
  9. 9.True or false: a fuse limits the current. (a) True (b) False
  10. 10.What does a diode do? (a) makes things spin (b) turns a fan or wheels (c) smooths a wobbly supply (d) lets current go one way
  11. 11.🧩 Which component senses how hot it is? (a) motor (b) transistor (c) resistor (d) thermistor
  12. 12.True or false: an LED makes things spin. (a) True (b) False
  13. 13.What does a buzzer do? (a) beeps for an alarm (b) is a resistance knob (c) has coloured bands (d) smooths a wobbly supply
  14. 14.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  15. 15.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  16. 16.🧩 Which component has coloured bands? (a) buzzer (b) capacitor (c) resistor (d) LED
  17. 17.🧩 Which component beeps for an alarm? (a) buzzer (b) LDR (c) capacitor (d) transistor
  18. 18.What does a resistor do? (a) beeps for an alarm (b) makes a beeping sound (c) limits the current (d) is a resistance knob
  19. 19.True or false: a thermistor senses how hot it is. (a) True (b) False
  20. 20.True or false: a transistor makes a beeping sound. (a) True (b) False
  21. 21.What does a motor do? (a) stores a little charge (b) turns a fan or wheels (c) lets current go one way (d) has coloured bands
  22. 22.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) LED (d) LDR
  23. 23.🧩 Which component stores a little charge? (a) transistor (b) diode (c) capacitor (d) resistor
  24. 24.True or false: an LED beeps for an alarm. (a) False (b) True
  25. 25.True or false: a buzzer boosts a small signal. (a) False (b) True
  26. 26.True or false: a buzzer glows using little power. (a) True (b) False
  27. 27.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) makes things spin (d) is a resistance knob
  28. 28.🧩 Which component is a resistance knob? (a) diode (b) transistor (c) thermistor (d) potentiometer
  29. 29.True or false: a potentiometer is a resistance knob. (a) True (b) False
  30. 30.True or false: an LDR beeps for an alarm. (a) True (b) False
  31. 31.🧩 Which component makes things spin? (a) motor (b) fuse (c) transistor (d) capacitor
  32. 32.True or false: an LDR is a resistance knob. (a) True (b) False
  33. 33.🧩 Which component turns a fan or wheels? (a) buzzer (b) capacitor (c) motor (d) LDR
  34. 34.True or false: a capacitor boosts a small signal. (a) False (b) True
  35. 35.True or false: a capacitor senses how hot it is. (a) False (b) True
  36. 36.What does a resistor do? (a) has coloured bands (b) smooths a wobbly supply (c) glows using little power (d) beeps for an alarm
  37. 37.True or false: an LED blows if current is high. (a) True (b) False
  38. 38.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) boosts a small signal (d) has coloured bands
  39. 39.True or false: an LDR limits the current. (a) True (b) False
  40. 40.What does an LDR do? (a) lets current go one way (b) smooths a wobbly supply (c) senses how bright it is (d) has coloured bands

Answer key

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

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