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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 237 · 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) fuse (b) resistor (c) motor (d) LED
  2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
  3. 3.What does a thermistor do? (a) blows if current is high (b) limits the current (c) turns a fan or wheels (d) senses how hot it is
  4. 4.True or false: a resistor has coloured bands. (a) True (b) False
  5. 5.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) fuse (d) motor
  6. 6.🧩 Which component beeps for an alarm? (a) fuse (b) transistor (c) LDR (d) buzzer
  7. 7.What does a potentiometer do? (a) is a resistance knob (b) lets current go one way (c) glows using little power (d) smooths a wobbly supply
  8. 8.🧩 Which component turns a fan or wheels? (a) potentiometer (b) LDR (c) capacitor (d) motor
  9. 9.True or false: an LED limits the current. (a) True (b) False
  10. 10.True or false: a diode is a resistance knob. (a) True (b) False
  11. 11.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) LDR (d) resistor
  12. 12.🧩 Which component senses how bright it is? (a) fuse (b) diode (c) LDR (d) buzzer
  13. 13.True or false: a fuse blows if current is high. (a) True (b) False
  14. 14.What does a diode do? (a) lets current go one way (b) turns a fan or wheels (c) makes a beeping sound (d) is a resistance knob
  15. 15.🧩 Which component lets current go one way? (a) diode (b) LDR (c) motor (d) capacitor
  16. 16.True or false: a motor makes things spin. (a) False (b) True
  17. 17.True or false: a diode senses how hot it is. (a) True (b) False
  18. 18.🧩 Which component blows if current is high? (a) motor (b) fuse (c) thermistor (d) LED
  19. 19.🧩 Which component limits the current? (a) diode (b) resistor (c) fuse (d) thermistor
  20. 20.What does a buzzer do? (a) smooths a wobbly supply (b) glows using little power (c) boosts a small signal (d) beeps for an alarm
  21. 21.True or false: a resistor senses how hot it is. (a) False (b) True
  22. 22.🧩 Which component senses how hot it is? (a) thermistor (b) LED (c) fuse (d) capacitor
  23. 23.🧩 Which component stores a little charge? (a) thermistor (b) motor (c) transistor (d) capacitor
  24. 24.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  25. 25.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  26. 26.What does a motor do? (a) stores a little charge (b) limits the current (c) glows using little power (d) turns a fan or wheels
  27. 27.True or false: a diode lets current go one way. (a) False (b) True
  28. 28.🧩 Which component is a resistance knob? (a) transistor (b) capacitor (c) potentiometer (d) thermistor
  29. 29.True or false: an LED stores a little charge. (a) True (b) False
  30. 30.True or false: a resistor makes a beeping sound. (a) True (b) False
  31. 31.🧩 Which component has coloured bands? (a) resistor (b) diode (c) transistor (d) potentiometer
  32. 32.True or false: an LED glows using little power. (a) True (b) False
  33. 33.🧩 Which component glows using little power? (a) buzzer (b) thermistor (c) diode (d) LED
  34. 34.🧩 Which component boosts a small signal? (a) capacitor (b) LED (c) motor (d) transistor
  35. 35.True or false: a transistor lets current go one way. (a) True (b) False
  36. 36.True or false: a diode blows if current is high. (a) False (b) True
  37. 37.True or false: a buzzer beeps for an alarm. (a) True (b) False
  38. 38.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) lets current go one way (d) glows using little power
  39. 39.What does a resistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) makes a beeping sound (d) limits the current
  40. 40.True or false: a transistor senses how bright it is. (a) True (b) False

Answer key

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

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