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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 88 · 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 hot it is (b) boosts a small signal (c) glows using little power (d) turns a fan or wheels
  2. 2.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) transistor (d) buzzer
  3. 3.🧩 Which component smooths a wobbly supply? (a) fuse (b) capacitor (c) LED (d) motor
  4. 4.What does a motor do? (a) smooths a wobbly supply (b) limits the current (c) is a resistance knob (d) makes things spin
  5. 5.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
  6. 6.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  7. 7.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) LED (d) motor
  8. 8.🧩 Which component turns a fan or wheels? (a) thermistor (b) motor (c) LED (d) resistor
  9. 9.🧩 Which component stores a little charge? (a) transistor (b) LED (c) LDR (d) capacitor
  10. 10.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) motor (d) transistor
  11. 11.What does a buzzer do? (a) blows if current is high (b) stores a little charge (c) beeps for an alarm (d) boosts a small signal
  12. 12.What does a diode do? (a) makes a beeping sound (b) glows using little power (c) lets current go one way (d) has coloured bands
  13. 13.🧩 Which component beeps for an alarm? (a) resistor (b) thermistor (c) buzzer (d) transistor
  14. 14.True or false: a diode glows using little power. (a) True (b) False
  15. 15.True or false: a resistor is a resistance knob. (a) True (b) False
  16. 16.What does an LED do? (a) boosts a small signal (b) blows if current is high (c) stores a little charge (d) glows using little power
  17. 17.What does a capacitor do? (a) glows using little power (b) stores a little charge (c) is a resistance knob (d) has coloured bands
  18. 18.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  19. 19.🧩 Which component blows if current is high? (a) thermistor (b) transistor (c) fuse (d) resistor
  20. 20.🧩 Which component makes a beeping sound? (a) diode (b) capacitor (c) buzzer (d) transistor
  21. 21.True or false: a motor stores a little charge. (a) True (b) False
  22. 22.🧩 Which component is a resistance knob? (a) motor (b) capacitor (c) buzzer (d) potentiometer
  23. 23.True or false: a thermistor has coloured bands. (a) True (b) False
  24. 24.True or false: a buzzer beeps for an alarm. (a) False (b) True
  25. 25.True or false: a resistor limits the current. (a) True (b) False
  26. 26.🧩 Which component senses how hot it is? (a) fuse (b) capacitor (c) thermistor (d) motor
  27. 27.True or false: a motor senses how bright it is. (a) True (b) False
  28. 28.🧩 Which component glows using little power? (a) LDR (b) LED (c) potentiometer (d) diode
  29. 29.🧩 Which component makes things spin? (a) motor (b) resistor (c) LDR (d) capacitor
  30. 30.True or false: a capacitor stores a little charge. (a) True (b) False
  31. 31.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) lets current go one way (d) stores a little charge
  32. 32.True or false: a diode lets current go one way. (a) True (b) False
  33. 33.What does a fuse do? (a) lets current go one way (b) limits the current (c) glows using little power (d) blows if current is high
  34. 34.What does a motor do? (a) senses how bright it is (b) has coloured bands (c) blows if current is high (d) turns a fan or wheels
  35. 35.True or false: a motor turns a fan or wheels. (a) True (b) False
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.True or false: a buzzer is a resistance knob. (a) False (b) True
  38. 38.What does an LDR do? (a) makes a beeping sound (b) senses how bright it is (c) has coloured bands (d) makes things spin
  39. 39.True or false: a resistor has coloured bands. (a) False (b) True
  40. 40.True or false: a thermistor makes a beeping sound. (a) True (b) False

Answer key

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

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