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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 591 · 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 diode do? (a) beeps for an alarm (b) lets current go one way (c) senses how hot it is (d) turns a fan or wheels
  2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) measure heat (d) make light
  3. 3.🧩 Which component is a resistance knob? (a) diode (b) potentiometer (c) capacitor (d) resistor
  4. 4.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
  6. 6.True or false: a motor blows if current is high. (a) False (b) True
  7. 7.True or false: a motor makes things spin. (a) True (b) False
  8. 8.What does a transistor do? (a) stores a little charge (b) beeps for an alarm (c) boosts a small signal (d) glows using little power
  9. 9.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) lets current go one way (d) limits the current
  10. 10.True or false: a motor turns a fan or wheels. (a) True (b) False
  11. 11.🧩 Which component beeps for an alarm? (a) potentiometer (b) motor (c) thermistor (d) buzzer
  12. 12.What does a capacitor do? (a) boosts a small signal (b) glows using little power (c) is a resistance knob (d) stores a little charge
  13. 13.🧩 Which component senses how bright it is? (a) transistor (b) thermistor (c) resistor (d) LDR
  14. 14.🧩 Which component stores a little charge? (a) LDR (b) capacitor (c) transistor (d) fuse
  15. 15.What does a buzzer do? (a) senses how hot it is (b) makes a beeping sound (c) is a resistance knob (d) smooths a wobbly supply
  16. 16.True or false: a resistor glows using little power. (a) True (b) False
  17. 17.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) capacitor (d) transistor
  18. 18.What does a resistor do? (a) limits the current (b) beeps for an alarm (c) glows using little power (d) lets current go one way
  19. 19.What does a fuse do? (a) senses how bright it is (b) makes a beeping sound (c) has coloured bands (d) blows if current is high
  20. 20.🧩 Which component senses how hot it is? (a) thermistor (b) buzzer (c) LDR (d) resistor
  21. 21.True or false: a fuse senses how hot it is. (a) True (b) False
  22. 22.🧩 Which component turns a fan or wheels? (a) diode (b) LDR (c) potentiometer (d) motor
  23. 23.What does an LED do? (a) stores a little charge (b) makes things spin (c) glows using little power (d) lets current go one way
  24. 24.🧩 Which component smooths a wobbly supply? (a) transistor (b) diode (c) resistor (d) capacitor
  25. 25.True or false: a resistor senses how hot it is. (a) False (b) True
  26. 26.True or false: a diode boosts a small signal. (a) False (b) True
  27. 27.What does a resistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) has coloured bands (d) senses how bright it is
  28. 28.True or false: an LDR glows using little power. (a) True (b) False
  29. 29.True or false: a motor stores a little charge. (a) True (b) False
  30. 30.True or false: a motor beeps for an alarm. (a) True (b) False
  31. 31.True or false: a thermistor senses how hot it is. (a) False (b) True
  32. 32.True or false: an LDR boosts a small signal. (a) True (b) False
  33. 33.True or false: a capacitor stores a little charge. (a) True (b) False
  34. 34.What does a motor do? (a) limits the current (b) makes things spin (c) lets current go one way (d) is a resistance knob
  35. 35.True or false: an LDR limits the current. (a) True (b) False
  36. 36.🧩 Which component lets current go one way? (a) diode (b) LDR (c) buzzer (d) resistor
  37. 37.True or false: a resistor limits the current. (a) True (b) False
  38. 38.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) buzzer (d) capacitor
  39. 39.What does a buzzer do? (a) beeps for an alarm (b) has coloured bands (c) senses how hot it is (d) turns a fan or wheels
  40. 40.True or false: a transistor senses how hot it is. (a) False (b) True

Answer key

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

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