← Electronic components lesson New set →

Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 390 · 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) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  2. 2.What does a diode do? (a) has coloured bands (b) lets current go one way (c) makes a beeping sound (d) glows using little power
  3. 3.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  4. 4.True or false: a motor makes a beeping sound. (a) False (b) True
  5. 5.True or false: an LDR makes things spin. (a) False (b) True
  6. 6.True or false: a potentiometer senses how bright it is. (a) False (b) True
  7. 7.What does a potentiometer do? (a) smooths a wobbly supply (b) makes a beeping sound (c) beeps for an alarm (d) is a resistance knob
  8. 8.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  9. 9.True or false: a transistor lets current go one way. (a) False (b) True
  10. 10.🧩 Which component blows if current is high? (a) fuse (b) diode (c) potentiometer (d) LED
  11. 11.True or false: a fuse stores a little charge. (a) True (b) False
  12. 12.What does a motor do? (a) limits the current (b) smooths a wobbly supply (c) makes things spin (d) has coloured bands
  13. 13.True or false: an LDR stores a little charge. (a) True (b) False
  14. 14.🧩 Which component stores a little charge? (a) LDR (b) motor (c) capacitor (d) resistor
  15. 15.🧩 Which component turns a fan or wheels? (a) transistor (b) capacitor (c) LDR (d) motor
  16. 16.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) resistor (d) motor
  17. 17.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) LED (d) fuse
  18. 18.What does a capacitor do? (a) stores a little charge (b) lets current go one way (c) glows using little power (d) makes a beeping sound
  19. 19.True or false: a transistor limits the current. (a) True (b) False
  20. 20.What does a thermistor do? (a) has coloured bands (b) makes things spin (c) boosts a small signal (d) senses how hot it is
  21. 21.What does a fuse do? (a) smooths a wobbly supply (b) limits the current (c) blows if current is high (d) turns a fan or wheels
  22. 22.🧩 Which component limits the current? (a) fuse (b) resistor (c) thermistor (d) motor
  23. 23.True or false: a capacitor blows if current is high. (a) True (b) False
  24. 24.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  25. 25.🧩 Which component is a resistance knob? (a) motor (b) potentiometer (c) resistor (d) capacitor
  26. 26.True or false: a fuse makes things spin. (a) True (b) False
  27. 27.True or false: a capacitor stores a little charge. (a) False (b) True
  28. 28.What does an LDR do? (a) has coloured bands (b) makes a beeping sound (c) senses how bright it is (d) senses how hot it is
  29. 29.True or false: a resistor senses how hot it is. (a) True (b) False
  30. 30.🧩 Which component has coloured bands? (a) LED (b) capacitor (c) LDR (d) resistor
  31. 31.What does a transistor do? (a) makes a beeping sound (b) lets current go one way (c) makes things spin (d) boosts a small signal
  32. 32.What does a resistor do? (a) makes a beeping sound (b) makes things spin (c) stores a little charge (d) has coloured bands
  33. 33.True or false: a potentiometer is a resistance knob. (a) False (b) True
  34. 34.True or false: a transistor glows using little power. (a) False (b) True
  35. 35.True or false: a buzzer beeps for an alarm. (a) True (b) False
  36. 36.What does a capacitor do? (a) glows using little power (b) smooths a wobbly supply (c) is a resistance knob (d) makes a beeping sound
  37. 37.True or false: a fuse blows if current is high. (a) True (b) False
  38. 38.True or false: a resistor has coloured bands. (a) True (b) False
  39. 39.What does an LED do? (a) blows if current is high (b) glows using little power (c) has coloured bands (d) makes things spin
  40. 40.🧩 Which component makes things spin? (a) motor (b) LED (c) diode (d) buzzer

Answer key

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

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