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Electronics Worksheet: Electronic Components

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

Answer key

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

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