← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 596 · 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.

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

Answer key

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

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids