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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 167 · 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 transistor do? (a) senses how bright it is (b) makes things spin (c) boosts a small signal (d) has coloured bands
  2. 2.True or false: a thermistor limits the current. (a) False (b) True
  3. 3.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) LED (d) fuse
  4. 4.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) has coloured bands (d) makes things spin
  5. 5.True or false: a resistor has coloured bands. (a) False (b) True
  6. 6.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  7. 7.What does a potentiometer do? (a) has coloured bands (b) stores a little charge (c) is a resistance knob (d) smooths a wobbly supply
  8. 8.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  9. 9.True or false: a fuse glows using little power. (a) False (b) True
  10. 10.🧩 Which component senses how hot it is? (a) thermistor (b) motor (c) capacitor (d) resistor
  11. 11.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  12. 12.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  13. 13.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  14. 14.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  15. 15.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) transistor (d) LED
  16. 16.🧩 Which component boosts a small signal? (a) buzzer (b) resistor (c) transistor (d) fuse
  17. 17.🧩 Which component is a resistance knob? (a) fuse (b) transistor (c) motor (d) potentiometer
  18. 18.What does a resistor do? (a) turns a fan or wheels (b) senses how bright it is (c) smooths a wobbly supply (d) has coloured bands
  19. 19.🧩 Which component beeps for an alarm? (a) fuse (b) motor (c) buzzer (d) transistor
  20. 20.True or false: a motor turns a fan or wheels. (a) False (b) True
  21. 21.🧩 Which component lets current go one way? (a) potentiometer (b) resistor (c) buzzer (d) diode
  22. 22.🧩 Which component glows using little power? (a) LDR (b) buzzer (c) fuse (d) LED
  23. 23.What does a buzzer do? (a) lets current go one way (b) beeps for an alarm (c) senses how bright it is (d) limits the current
  24. 24.True or false: a thermistor senses how hot it is. (a) False (b) True
  25. 25.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) senses how hot it is (d) makes a beeping sound
  26. 26.🧩 Which component turns a fan or wheels? (a) thermistor (b) LED (c) motor (d) buzzer
  27. 27.True or false: a capacitor beeps for an alarm. (a) True (b) False
  28. 28.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) limits the current (d) makes things spin
  29. 29.What does an LED do? (a) turns a fan or wheels (b) beeps for an alarm (c) glows using little power (d) is a resistance knob
  30. 30.🧩 Which component limits the current? (a) transistor (b) diode (c) resistor (d) potentiometer
  31. 31.True or false: a diode lets current go one way. (a) False (b) True
  32. 32.True or false: a thermistor makes things spin. (a) False (b) True
  33. 33.True or false: a buzzer blows if current is high. (a) False (b) True
  34. 34.🧩 Which component makes a beeping sound? (a) potentiometer (b) thermistor (c) buzzer (d) capacitor
  35. 35.True or false: a buzzer beeps for an alarm. (a) False (b) True
  36. 36.True or false: an LED glows using little power. (a) True (b) False
  37. 37.🧩 Which component senses how bright it is? (a) diode (b) LDR (c) fuse (d) buzzer
  38. 38.What does a diode do? (a) stores a little charge (b) lets current go one way (c) is a resistance knob (d) limits the current
  39. 39.🧩 Which component makes things spin? (a) motor (b) LED (c) resistor (d) potentiometer
  40. 40.True or false: an LDR senses how hot it is. (a) True (b) False

Answer key

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

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