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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 155 · 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.True or false: a resistor limits the current. (a) True (b) False
  2. 2.🧩 Which component blows if current is high? (a) fuse (b) transistor (c) LED (d) thermistor
  3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  4. 4.🧩 Which component smooths a wobbly supply? (a) transistor (b) thermistor (c) capacitor (d) LDR
  5. 5.🧩 Which component senses how hot it is? (a) fuse (b) resistor (c) buzzer (d) thermistor
  6. 6.What does an LDR do? (a) blows if current is high (b) senses how bright it is (c) makes a beeping sound (d) glows using little power
  7. 7.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) makes a beeping sound (d) turns a fan or wheels
  8. 8.🧩 Which component makes a beeping sound? (a) potentiometer (b) motor (c) buzzer (d) transistor
  9. 9.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) turns a fan or wheels (d) limits the current
  10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  11. 11.What does a fuse do? (a) turns a fan or wheels (b) senses how hot it is (c) glows using little power (d) blows if current is high
  12. 12.True or false: an LED glows using little power. (a) False (b) True
  13. 13.True or false: a diode smooths a wobbly supply. (a) True (b) False
  14. 14.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  15. 15.What does a motor do? (a) glows using little power (b) makes things spin (c) lets current go one way (d) blows if current is high
  16. 16.True or false: an LED limits the current. (a) True (b) False
  17. 17.True or false: a motor makes things spin. (a) True (b) False
  18. 18.What does a transistor do? (a) has coloured bands (b) boosts a small signal (c) glows using little power (d) turns a fan or wheels
  19. 19.True or false: an LDR senses how bright it is. (a) False (b) True
  20. 20.What does a diode do? (a) lets current go one way (b) senses how hot it is (c) senses how bright it is (d) makes things spin
  21. 21.What does an LED do? (a) senses how bright it is (b) blows if current is high (c) turns a fan or wheels (d) glows using little power
  22. 22.🧩 Which component glows using little power? (a) diode (b) transistor (c) potentiometer (d) LED
  23. 23.True or false: a resistor has coloured bands. (a) True (b) False
  24. 24.True or false: a buzzer beeps for an alarm. (a) False (b) True
  25. 25.True or false: a capacitor boosts a small signal. (a) True (b) False
  26. 26.🧩 Which component boosts a small signal? (a) LDR (b) capacitor (c) buzzer (d) transistor
  27. 27.True or false: a potentiometer blows if current is high. (a) True (b) False
  28. 28.True or false: a potentiometer senses how hot it is. (a) True (b) False
  29. 29.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  30. 30.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) resistor (d) potentiometer
  31. 31.🧩 Which component limits the current? (a) LED (b) resistor (c) motor (d) fuse
  32. 32.True or false: a thermistor senses how hot it is. (a) True (b) False
  33. 33.True or false: a diode makes a beeping sound. (a) True (b) False
  34. 34.What does a motor do? (a) turns a fan or wheels (b) lets current go one way (c) stores a little charge (d) senses how bright it is
  35. 35.What does a buzzer do? (a) stores a little charge (b) makes things spin (c) makes a beeping sound (d) senses how hot it is
  36. 36.True or false: a thermistor makes a beeping sound. (a) True (b) False
  37. 37.True or false: a capacitor stores a little charge. (a) True (b) False
  38. 38.🧩 Which component lets current go one way? (a) thermistor (b) potentiometer (c) buzzer (d) diode
  39. 39.🧩 Which component has coloured bands? (a) thermistor (b) resistor (c) transistor (d) capacitor
  40. 40.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False

Answer key

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

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