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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 229 · 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.What does a thermistor do? (a) stores a little charge (b) turns a fan or wheels (c) senses how bright it is (d) senses how hot it is
  2. 2.🧩 Which component limits the current? (a) motor (b) thermistor (c) LED (d) resistor
  3. 3.🧩 Which component glows using little power? (a) LED (b) LDR (c) thermistor (d) transistor
  4. 4.🧩 Which component smooths a wobbly supply? (a) LDR (b) buzzer (c) capacitor (d) motor
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  6. 6.🧩 Which component stores a little charge? (a) fuse (b) LDR (c) capacitor (d) thermistor
  7. 7.True or false: a motor makes things spin. (a) False (b) True
  8. 8.True or false: a fuse senses how bright it is. (a) True (b) False
  9. 9.🧩 Which component lets current go one way? (a) thermistor (b) capacitor (c) diode (d) fuse
  10. 10.True or false: a thermistor senses how hot it is. (a) True (b) False
  11. 11.What does a transistor do? (a) stores a little charge (b) has coloured bands (c) boosts a small signal (d) makes things spin
  12. 12.🧩 Which component is a resistance knob? (a) LDR (b) LED (c) capacitor (d) potentiometer
  13. 13.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  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 diode do? (a) beeps for an alarm (b) limits the current (c) senses how bright it is (d) lets current go one way
  16. 16.True or false: a fuse blows if current is high. (a) False (b) True
  17. 17.🧩 Which component has coloured bands? (a) fuse (b) LDR (c) capacitor (d) resistor
  18. 18.What does a capacitor do? (a) makes a beeping sound (b) limits the current (c) smooths a wobbly supply (d) senses how bright it is
  19. 19.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) blows if current is high (d) stores a little charge
  20. 20.What does a motor do? (a) has coloured bands (b) lets current go one way (c) glows using little power (d) makes things spin
  21. 21.True or false: a thermistor makes things spin. (a) False (b) True
  22. 22.True or false: an LED is a resistance knob. (a) False (b) True
  23. 23.True or false: a resistor has coloured bands. (a) False (b) True
  24. 24.True or false: a thermistor has coloured bands. (a) True (b) False
  25. 25.What does a resistor do? (a) has coloured bands (b) beeps for an alarm (c) senses how hot it is (d) makes a beeping sound
  26. 26.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  27. 27.🧩 Which component beeps for an alarm? (a) potentiometer (b) motor (c) transistor (d) buzzer
  28. 28.What does an LED do? (a) is a resistance knob (b) lets current go one way (c) glows using little power (d) makes a beeping sound
  29. 29.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) makes a beeping sound (d) limits the current
  30. 30.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) fuse (d) resistor
  31. 31.True or false: a potentiometer is a resistance knob. (a) False (b) True
  32. 32.True or false: a thermistor beeps for an alarm. (a) False (b) True
  33. 33.What does a potentiometer do? (a) senses how hot it is (b) turns a fan or wheels (c) senses how bright it is (d) is a resistance knob
  34. 34.True or false: a buzzer makes a beeping sound. (a) False (b) True
  35. 35.True or false: a buzzer is a resistance knob. (a) False (b) True
  36. 36.True or false: a buzzer lets current go one way. (a) False (b) True
  37. 37.True or false: a motor senses how bright it is. (a) True (b) False
  38. 38.What does a fuse do? (a) lets current go one way (b) makes things spin (c) blows if current is high (d) is a resistance knob
  39. 39.🧩 Which component makes a beeping sound? (a) LED (b) diode (c) buzzer (d) capacitor
  40. 40.True or false: a transistor beeps for an alarm. (a) False (b) True

Answer key

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

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