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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 239 · 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 makes things spin? (a) buzzer (b) motor (c) capacitor (d) transistor
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  3. 3.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) LED (d) diode
  4. 4.What does a potentiometer do? (a) lets current go one way (b) glows using little power (c) senses how hot it is (d) is a resistance knob
  5. 5.True or false: a buzzer makes a beeping sound. (a) True (b) False
  6. 6.True or false: an LDR senses how bright it is. (a) False (b) True
  7. 7.True or false: a motor makes things spin. (a) False (b) True
  8. 8.True or false: a motor blows if current is high. (a) False (b) True
  9. 9.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) blows if current is high (d) senses how hot it is
  10. 10.🧩 Which component boosts a small signal? (a) transistor (b) LED (c) potentiometer (d) capacitor
  11. 11.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  12. 12.What does a capacitor do? (a) senses how hot it is (b) senses how bright it is (c) is a resistance knob (d) stores a little charge
  13. 13.🧩 Which component glows using little power? (a) diode (b) LDR (c) LED (d) resistor
  14. 14.🧩 Which component has coloured bands? (a) resistor (b) LED (c) capacitor (d) buzzer
  15. 15.True or false: a potentiometer is a resistance knob. (a) True (b) False
  16. 16.True or false: a resistor limits the current. (a) True (b) False
  17. 17.True or false: a fuse stores a little charge. (a) True (b) False
  18. 18.🧩 Which component limits the current? (a) transistor (b) motor (c) thermistor (d) resistor
  19. 19.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  20. 20.What does a resistor do? (a) senses how hot it is (b) glows using little power (c) beeps for an alarm (d) has coloured bands
  21. 21.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) resistor (d) motor
  22. 22.True or false: a motor turns a fan or wheels. (a) False (b) True
  23. 23.True or false: a fuse limits the current. (a) False (b) True
  24. 24.True or false: a thermistor senses how hot it is. (a) False (b) True
  25. 25.What does an LED do? (a) turns a fan or wheels (b) stores a little charge (c) senses how bright it is (d) glows using little power
  26. 26.What does a fuse do? (a) has coloured bands (b) makes a beeping sound (c) turns a fan or wheels (d) blows if current is high
  27. 27.What does a thermistor do? (a) is a resistance knob (b) blows if current is high (c) senses how hot it is (d) makes a beeping sound
  28. 28.🧩 Which component smooths a wobbly supply? (a) thermistor (b) capacitor (c) potentiometer (d) resistor
  29. 29.🧩 Which component beeps for an alarm? (a) resistor (b) LDR (c) transistor (d) buzzer
  30. 30.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  31. 31.True or false: a buzzer limits the current. (a) False (b) True
  32. 32.What does a buzzer do? (a) lets current go one way (b) stores a little charge (c) senses how bright it is (d) beeps for an alarm
  33. 33.What does a resistor do? (a) limits the current (b) makes a beeping sound (c) is a resistance knob (d) senses how bright it is
  34. 34.True or false: a capacitor glows using little power. (a) False (b) True
  35. 35.What does a diode do? (a) glows using little power (b) makes things spin (c) lets current go one way (d) stores a little charge
  36. 36.🧩 Which component is a resistance knob? (a) transistor (b) capacitor (c) fuse (d) potentiometer
  37. 37.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) fuse (d) buzzer
  38. 38.🧩 Which component senses how bright it is? (a) fuse (b) LDR (c) diode (d) LED
  39. 39.True or false: a resistor makes a beeping sound. (a) True (b) False
  40. 40.What does an LDR do? (a) senses how bright it is (b) smooths a wobbly supply (c) makes things spin (d) makes a beeping sound

Answer key

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

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