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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 597 · 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 an LDR do? (a) makes a beeping sound (b) glows using little power (c) senses how bright it is (d) boosts a small signal
  2. 2.🧩 Which component has coloured bands? (a) motor (b) fuse (c) resistor (d) LED
  3. 3.What does a capacitor do? (a) turns a fan or wheels (b) stores a little charge (c) beeps for an alarm (d) senses how bright it is
  4. 4.True or false: an LED stores a little charge. (a) True (b) False
  5. 5.What does a capacitor do? (a) lets current go one way (b) smooths a wobbly supply (c) senses how bright it is (d) boosts a small signal
  6. 6.True or false: an LED makes a beeping sound. (a) False (b) True
  7. 7.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) transistor (d) thermistor
  8. 8.🧩 Which component limits the current? (a) diode (b) fuse (c) LDR (d) resistor
  9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  10. 10.True or false: a buzzer beeps for an alarm. (a) False (b) True
  11. 11.🧩 Which component stores a little charge? (a) thermistor (b) potentiometer (c) buzzer (d) capacitor
  12. 12.🧩 Which component is a resistance knob? (a) potentiometer (b) motor (c) resistor (d) transistor
  13. 13.True or false: a buzzer stores a little charge. (a) True (b) False
  14. 14.True or false: a resistor has coloured bands. (a) False (b) True
  15. 15.What does an LED do? (a) has coloured bands (b) beeps for an alarm (c) smooths a wobbly supply (d) glows using little power
  16. 16.What does a transistor do? (a) smooths a wobbly supply (b) glows using little power (c) boosts a small signal (d) makes a beeping sound
  17. 17.True or false: a potentiometer is a resistance knob. (a) True (b) False
  18. 18.🧩 Which component beeps for an alarm? (a) buzzer (b) LDR (c) transistor (d) diode
  19. 19.True or false: a capacitor senses how hot it is. (a) False (b) True
  20. 20.What does a thermistor do? (a) senses how hot it is (b) beeps for an alarm (c) is a resistance knob (d) turns a fan or wheels
  21. 21.True or false: a capacitor is a resistance knob. (a) False (b) True
  22. 22.True or false: a diode blows if current is high. (a) False (b) True
  23. 23.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  24. 24.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) potentiometer (d) fuse
  25. 25.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a resistor (d) a capacitor
  26. 26.True or false: a transistor lets current go one way. (a) False (b) True
  27. 27.🧩 Which component senses how hot it is? (a) transistor (b) thermistor (c) motor (d) diode
  28. 28.What does a buzzer do? (a) makes things spin (b) smooths a wobbly supply (c) senses how bright it is (d) makes a beeping sound
  29. 29.True or false: a resistor makes things spin. (a) False (b) True
  30. 30.True or false: an LDR glows using little power. (a) True (b) False
  31. 31.🧩 Which component blows if current is high? (a) diode (b) fuse (c) capacitor (d) LDR
  32. 32.True or false: a motor makes things spin. (a) True (b) False
  33. 33.What does a motor do? (a) glows using little power (b) is a resistance knob (c) senses how bright it is (d) makes things spin
  34. 34.True or false: an LED limits the current. (a) True (b) False
  35. 35.True or false: a buzzer makes a beeping sound. (a) False (b) True
  36. 36.True or false: a buzzer blows if current is high. (a) False (b) True
  37. 37.What does a potentiometer do? (a) stores a little charge (b) limits the current (c) lets current go one way (d) is a resistance knob
  38. 38.True or false: a thermistor makes things spin. (a) True (b) False
  39. 39.🧩 Which component makes a beeping sound? (a) resistor (b) LDR (c) potentiometer (d) buzzer
  40. 40.True or false: a buzzer boosts a small signal. (a) True (b) False

Answer key

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

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