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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 663 · 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 buzzer do? (a) senses how hot it is (b) beeps for an alarm (c) makes things spin (d) senses how bright it is
  2. 2.True or false: a buzzer turns a fan or wheels. (a) True (b) False
  3. 3.🧩 Which component blows if current is high? (a) fuse (b) diode (c) motor (d) resistor
  4. 4.🧩 Which component stores a little charge? (a) thermistor (b) capacitor (c) LDR (d) potentiometer
  5. 5.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  6. 6.🧩 Which component makes things spin? (a) thermistor (b) LED (c) motor (d) resistor
  7. 7.What does a diode do? (a) limits the current (b) senses how hot it is (c) lets current go one way (d) has coloured bands
  8. 8.What does a transistor do? (a) lets current go one way (b) boosts a small signal (c) makes things spin (d) senses how bright it is
  9. 9.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  10. 10.🧩 Which component boosts a small signal? (a) potentiometer (b) transistor (c) resistor (d) buzzer
  11. 11.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  12. 12.True or false: a diode limits the current. (a) True (b) False
  13. 13.What does a buzzer do? (a) makes things spin (b) has coloured bands (c) makes a beeping sound (d) blows if current is high
  14. 14.True or false: a buzzer beeps for an alarm. (a) True (b) False
  15. 15.What does a resistor do? (a) makes things spin (b) lets current go one way (c) limits the current (d) glows using little power
  16. 16.What does an LED do? (a) makes things spin (b) has coloured bands (c) glows using little power (d) boosts a small signal
  17. 17.What does a fuse do? (a) stores a little charge (b) senses how hot it is (c) turns a fan or wheels (d) blows if current is high
  18. 18.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) LDR (d) LED
  19. 19.🧩 Which component senses how bright it is? (a) capacitor (b) motor (c) buzzer (d) LDR
  20. 20.True or false: a diode blows if current is high. (a) False (b) True
  21. 21.🧩 Which component smooths a wobbly supply? (a) LED (b) resistor (c) capacitor (d) motor
  22. 22.🧩 Which component lets current go one way? (a) resistor (b) LED (c) buzzer (d) diode
  23. 23.What does a potentiometer do? (a) is a resistance knob (b) makes a beeping sound (c) senses how bright it is (d) stores a little charge
  24. 24.True or false: a motor boosts a small signal. (a) True (b) False
  25. 25.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) thermistor (d) buzzer
  26. 26.True or false: a diode lets current go one way. (a) False (b) True
  27. 27.🧩 Which component has coloured bands? (a) diode (b) transistor (c) resistor (d) LED
  28. 28.🧩 Which component turns a fan or wheels? (a) buzzer (b) diode (c) motor (d) fuse
  29. 29.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  30. 30.True or false: a diode makes things spin. (a) True (b) False
  31. 31.True or false: a buzzer lets current go one way. (a) True (b) False
  32. 32.True or false: a capacitor stores a little charge. (a) True (b) False
  33. 33.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) resistor (d) diode
  34. 34.What does an LDR do? (a) limits the current (b) blows if current is high (c) senses how bright it is (d) boosts a small signal
  35. 35.True or false: a resistor has coloured bands. (a) True (b) False
  36. 36.🧩 Which component beeps for an alarm? (a) LED (b) diode (c) fuse (d) buzzer
  37. 37.True or false: a resistor lets current go one way. (a) False (b) True
  38. 38.True or false: a potentiometer senses how bright it is. (a) False (b) True
  39. 39.True or false: a fuse senses how hot it is. (a) True (b) False
  40. 40.True or false: a capacitor lets current go one way. (a) False (b) True

Answer key

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

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