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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 201 · 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 turns a fan or wheels? (a) motor (b) potentiometer (c) capacitor (d) LED
  2. 2.True or false: an LED makes a beeping sound. (a) False (b) True
  3. 3.🧩 Which component glows using little power? (a) resistor (b) LED (c) buzzer (d) diode
  4. 4.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) fuse (d) resistor
  5. 5.What does a resistor do? (a) makes a beeping sound (b) senses how hot it is (c) senses how bright it is (d) limits the current
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
  7. 7.What does a capacitor do? (a) makes things spin (b) limits the current (c) senses how hot it is (d) smooths a wobbly supply
  8. 8.🧩 Which component smooths a wobbly supply? (a) buzzer (b) LED (c) capacitor (d) resistor
  9. 9.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  10. 10.What does a fuse do? (a) limits the current (b) blows if current is high (c) makes a beeping sound (d) smooths a wobbly supply
  11. 11.What does a diode do? (a) makes things spin (b) is a resistance knob (c) blows if current is high (d) lets current go one way
  12. 12.True or false: a capacitor stores a little charge. (a) False (b) True
  13. 13.True or false: a thermistor senses how hot it is. (a) True (b) False
  14. 14.🧩 Which component boosts a small signal? (a) buzzer (b) motor (c) resistor (d) transistor
  15. 15.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  16. 16.What does a motor do? (a) turns a fan or wheels (b) has coloured bands (c) lets current go one way (d) smooths a wobbly supply
  17. 17.What does a transistor do? (a) boosts a small signal (b) beeps for an alarm (c) makes a beeping sound (d) lets current go one way
  18. 18.🧩 Which component senses how bright it is? (a) motor (b) potentiometer (c) fuse (d) LDR
  19. 19.What does an LED do? (a) beeps for an alarm (b) has coloured bands (c) glows using little power (d) is a resistance knob
  20. 20.🧩 Which component has coloured bands? (a) diode (b) buzzer (c) thermistor (d) resistor
  21. 21.True or false: a buzzer blows if current is high. (a) False (b) True
  22. 22.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) thermistor (d) capacitor
  23. 23.True or false: a motor limits the current. (a) True (b) False
  24. 24.What does a buzzer do? (a) makes a beeping sound (b) lets current go one way (c) has coloured bands (d) blows if current is high
  25. 25.True or false: a resistor limits the current. (a) True (b) False
  26. 26.🧩 Which component makes things spin? (a) fuse (b) capacitor (c) motor (d) resistor
  27. 27.True or false: a potentiometer is a resistance knob. (a) True (b) False
  28. 28.True or false: a thermistor blows if current is high. (a) True (b) False
  29. 29.True or false: a motor turns a fan or wheels. (a) False (b) True
  30. 30.True or false: a resistor has coloured bands. (a) True (b) False
  31. 31.True or false: a diode lets current go one way. (a) False (b) True
  32. 32.True or false: an LDR senses how bright it is. (a) False (b) True
  33. 33.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  34. 34.True or false: a buzzer makes a beeping sound. (a) False (b) True
  35. 35.What does a thermistor do? (a) turns a fan or wheels (b) stores a little charge (c) senses how hot it is (d) makes things spin
  36. 36.What does a buzzer do? (a) glows using little power (b) beeps for an alarm (c) senses how bright it is (d) turns a fan or wheels
  37. 37.True or false: a buzzer stores a little charge. (a) True (b) False
  38. 38.🧩 Which component limits the current? (a) resistor (b) buzzer (c) motor (d) capacitor
  39. 39.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  40. 40.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) resistor (d) LDR

Answer key

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

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