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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 652 · 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.True or false: a buzzer beeps for an alarm. (a) False (b) True
  2. 2.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) spin a wheel (d) make light
  3. 3.True or false: a resistor limits the current. (a) False (b) True
  4. 4.True or false: a capacitor makes things spin. (a) True (b) False
  5. 5.True or false: a resistor lets current go one way. (a) False (b) True
  6. 6.🧩 Which component has coloured bands? (a) fuse (b) motor (c) buzzer (d) resistor
  7. 7.True or false: a fuse smooths a wobbly supply. (a) False (b) True
  8. 8.True or false: a capacitor glows using little power. (a) True (b) False
  9. 9.True or false: a resistor has coloured bands. (a) True (b) False
  10. 10.True or false: a fuse beeps for an alarm. (a) True (b) False
  11. 11.True or false: a diode lets current go one way. (a) False (b) True
  12. 12.🧩 Which component stores a little charge? (a) capacitor (b) diode (c) motor (d) resistor
  13. 13.🧩 Which component smooths a wobbly supply? (a) resistor (b) potentiometer (c) LDR (d) capacitor
  14. 14.What does a resistor do? (a) lets current go one way (b) senses how bright it is (c) turns a fan or wheels (d) limits the current
  15. 15.True or false: a buzzer makes a beeping sound. (a) True (b) False
  16. 16.True or false: an LDR is a resistance knob. (a) True (b) False
  17. 17.🧩 Which component is a resistance knob? (a) buzzer (b) fuse (c) potentiometer (d) transistor
  18. 18.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) LED (d) potentiometer
  19. 19.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a diode (d) a capacitor
  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.🧩 Which component lets current go one way? (a) resistor (b) LED (c) motor (d) diode
  22. 22.🧩 Which component senses how bright it is? (a) LDR (b) resistor (c) potentiometer (d) capacitor
  23. 23.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) limits the current (d) blows if current is high
  24. 24.What does a capacitor do? (a) makes a beeping sound (b) beeps for an alarm (c) smooths a wobbly supply (d) makes things spin
  25. 25.What does an LED do? (a) beeps for an alarm (b) limits the current (c) lets current go one way (d) glows using little power
  26. 26.True or false: an LDR glows using little power. (a) False (b) True
  27. 27.🧩 Which component limits the current? (a) potentiometer (b) diode (c) resistor (d) motor
  28. 28.What does a potentiometer do? (a) beeps for an alarm (b) limits the current (c) smooths a wobbly supply (d) is a resistance knob
  29. 29.True or false: a buzzer glows using little power. (a) True (b) False
  30. 30.True or false: a motor makes things spin. (a) True (b) False
  31. 31.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) buzzer (d) motor
  32. 32.True or false: a buzzer boosts a small signal. (a) True (b) False
  33. 33.🧩 Which component makes a beeping sound? (a) resistor (b) motor (c) buzzer (d) potentiometer
  34. 34.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) senses how hot it is (d) limits the current
  35. 35.True or false: an LED glows using little power. (a) False (b) True
  36. 36.True or false: a motor makes a beeping sound. (a) True (b) False
  37. 37.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  38. 38.What does an LDR do? (a) turns a fan or wheels (b) senses how bright it is (c) smooths a wobbly supply (d) lets current go one way
  39. 39.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) smooths a wobbly supply (d) makes a beeping sound
  40. 40.True or false: a thermistor senses how hot it is. (a) False (b) True

Answer key

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

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