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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 650 · 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.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  2. 2.What does a thermistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) lets current go one way (d) senses how hot it is
  3. 3.🧩 Which component glows using little power? (a) motor (b) fuse (c) diode (d) LED
  4. 4.True or false: a potentiometer limits the current. (a) True (b) False
  5. 5.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) motor (d) transistor
  6. 6.🧩 Which component smooths a wobbly supply? (a) buzzer (b) thermistor (c) capacitor (d) LDR
  7. 7.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  8. 8.🧩 Which component is a resistance knob? (a) resistor (b) transistor (c) capacitor (d) potentiometer
  9. 9.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) motor (d) thermistor
  10. 10.What does a fuse do? (a) makes a beeping sound (b) turns a fan or wheels (c) blows if current is high (d) lets current go one way
  11. 11.🧩 Which component lets current go one way? (a) capacitor (b) buzzer (c) transistor (d) diode
  12. 12.What does an LDR do? (a) has coloured bands (b) makes a beeping sound (c) turns a fan or wheels (d) senses how bright it is
  13. 13.🧩 Which component makes a beeping sound? (a) thermistor (b) diode (c) LED (d) buzzer
  14. 14.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  15. 15.True or false: a diode lets current go one way. (a) False (b) True
  16. 16.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) transistor (d) thermistor
  17. 17.True or false: a resistor limits the current. (a) False (b) True
  18. 18.🧩 Which component senses how hot it is? (a) thermistor (b) motor (c) LDR (d) resistor
  19. 19.🧩 Which component blows if current is high? (a) thermistor (b) capacitor (c) motor (d) fuse
  20. 20.What does a motor do? (a) turns a fan or wheels (b) stores a little charge (c) smooths a wobbly supply (d) blows if current is high
  21. 21.What does a transistor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) makes things spin (d) boosts a small signal
  22. 22.What does a resistor do? (a) lets current go one way (b) smooths a wobbly supply (c) has coloured bands (d) blows if current is high
  23. 23.What does an LED do? (a) glows using little power (b) senses how hot it is (c) has coloured bands (d) boosts a small signal
  24. 24.🧩 Which component turns a fan or wheels? (a) diode (b) capacitor (c) motor (d) LDR
  25. 25.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  26. 26.True or false: an LED stores a little charge. (a) True (b) False
  27. 27.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) motor (d) buzzer
  28. 28.True or false: a potentiometer is a resistance knob. (a) False (b) True
  29. 29.What does a potentiometer do? (a) makes things spin (b) senses how hot it is (c) is a resistance knob (d) beeps for an alarm
  30. 30.True or false: an LED has coloured bands. (a) True (b) False
  31. 31.True or false: a capacitor has coloured bands. (a) False (b) True
  32. 32.🧩 Which component makes things spin? (a) diode (b) transistor (c) motor (d) LED
  33. 33.🧩 Which component limits the current? (a) thermistor (b) resistor (c) fuse (d) buzzer
  34. 34.True or false: a potentiometer senses how bright it is. (a) False (b) True
  35. 35.🧩 Which component beeps for an alarm? (a) fuse (b) buzzer (c) motor (d) diode
  36. 36.True or false: a motor blows if current is high. (a) False (b) True
  37. 37.True or false: an LED glows using little power. (a) False (b) True
  38. 38.What does a diode do? (a) turns a fan or wheels (b) has coloured bands (c) lets current go one way (d) beeps for an alarm
  39. 39.True or false: a potentiometer boosts a small signal. (a) False (b) True
  40. 40.True or false: an LDR limits the current. (a) True (b) False

Answer key

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

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