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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 245 · 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) boosts a small signal (b) makes a beeping sound (c) senses how bright it is (d) blows if current is high
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  3. 3.🧩 Which component senses how hot it is? (a) motor (b) resistor (c) thermistor (d) transistor
  4. 4.🧩 Which component has coloured bands? (a) LED (b) resistor (c) buzzer (d) potentiometer
  5. 5.🧩 Which component senses how bright it is? (a) resistor (b) thermistor (c) LDR (d) capacitor
  6. 6.🧩 Which component stores a little charge? (a) potentiometer (b) buzzer (c) capacitor (d) fuse
  7. 7.🧩 Which component turns a fan or wheels? (a) resistor (b) buzzer (c) motor (d) fuse
  8. 8.🧩 Which component makes a beeping sound? (a) LDR (b) motor (c) buzzer (d) transistor
  9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  10. 10.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
  11. 11.🧩 Which component smooths a wobbly supply? (a) resistor (b) thermistor (c) capacitor (d) diode
  12. 12.True or false: a capacitor makes things spin. (a) True (b) False
  13. 13.True or false: an LDR turns a fan or wheels. (a) False (b) True
  14. 14.What does a capacitor do? (a) limits the current (b) has coloured bands (c) lets current go one way (d) stores a little charge
  15. 15.🧩 Which component glows using little power? (a) LED (b) potentiometer (c) buzzer (d) motor
  16. 16.🧩 Which component boosts a small signal? (a) diode (b) motor (c) resistor (d) transistor
  17. 17.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) is a resistance knob (d) limits the current
  18. 18.True or false: a buzzer makes a beeping sound. (a) False (b) True
  19. 19.What does a resistor do? (a) limits the current (b) stores a little charge (c) lets current go one way (d) glows using little power
  20. 20.True or false: a resistor has coloured bands. (a) False (b) True
  21. 21.What does an LDR do? (a) beeps for an alarm (b) smooths a wobbly supply (c) senses how bright it is (d) has coloured bands
  22. 22.What does a potentiometer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) makes a beeping sound (d) is a resistance knob
  23. 23.🧩 Which component is a resistance knob? (a) potentiometer (b) capacitor (c) LDR (d) LED
  24. 24.What does a motor do? (a) senses how hot it is (b) stores a little charge (c) limits the current (d) turns a fan or wheels
  25. 25.True or false: a diode lets current go one way. (a) False (b) True
  26. 26.🧩 Which component lets current go one way? (a) resistor (b) motor (c) LDR (d) diode
  27. 27.True or false: an LDR makes things spin. (a) False (b) True
  28. 28.🧩 Which component beeps for an alarm? (a) diode (b) potentiometer (c) LED (d) buzzer
  29. 29.True or false: a capacitor stores a little charge. (a) True (b) False
  30. 30.🧩 Which component makes things spin? (a) motor (b) capacitor (c) transistor (d) LDR
  31. 31.True or false: a buzzer beeps for an alarm. (a) False (b) True
  32. 32.True or false: a thermistor stores a little charge. (a) False (b) True
  33. 33.What does a buzzer do? (a) makes things spin (b) glows using little power (c) beeps for an alarm (d) smooths a wobbly supply
  34. 34.What does a diode do? (a) makes a beeping sound (b) senses how bright it is (c) is a resistance knob (d) lets current go one way
  35. 35.True or false: a transistor limits the current. (a) False (b) True
  36. 36.What does a buzzer do? (a) boosts a small signal (b) makes a beeping sound (c) lets current go one way (d) smooths a wobbly supply
  37. 37.True or false: a diode makes things spin. (a) True (b) False
  38. 38.🧩 Which component limits the current? (a) capacitor (b) potentiometer (c) resistor (d) thermistor
  39. 39.What does a capacitor do? (a) boosts a small signal (b) makes things spin (c) limits the current (d) smooths a wobbly supply
  40. 40.True or false: an LDR beeps for an alarm. (a) False (b) True

Answer key

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

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