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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 118 · 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.True or false: a potentiometer is a resistance knob. (a) True (b) False
  2. 2.🧩 Which component boosts a small signal? (a) motor (b) buzzer (c) transistor (d) LDR
  3. 3.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
  4. 4.True or false: a fuse blows if current is high. (a) False (b) True
  5. 5.What does a motor do? (a) glows using little power (b) limits the current (c) blows if current is high (d) makes things spin
  6. 6.True or false: a resistor limits the current. (a) False (b) True
  7. 7.What does a motor do? (a) makes a beeping sound (b) turns a fan or wheels (c) boosts a small signal (d) beeps for an alarm
  8. 8.What does a diode do? (a) senses how bright it is (b) is a resistance knob (c) beeps for an alarm (d) lets current go one way
  9. 9.What does an LDR do? (a) has coloured bands (b) stores a little charge (c) senses how bright it is (d) blows if current is high
  10. 10.True or false: a capacitor lets current go one way. (a) True (b) False
  11. 11.True or false: an LDR beeps for an alarm. (a) True (b) False
  12. 12.🧩 Which component smooths a wobbly supply? (a) LED (b) capacitor (c) LDR (d) thermistor
  13. 13.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) transistor (d) resistor
  14. 14.🧩 Which component is a resistance knob? (a) LDR (b) thermistor (c) buzzer (d) potentiometer
  15. 15.🧩 Which component blows if current is high? (a) thermistor (b) motor (c) LED (d) fuse
  16. 16.🧩 Which component limits the current? (a) motor (b) resistor (c) diode (d) potentiometer
  17. 17.🧩 Which component makes things spin? (a) motor (b) capacitor (c) buzzer (d) LED
  18. 18.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
  19. 19.🧩 Which component stores a little charge? (a) thermistor (b) resistor (c) buzzer (d) capacitor
  20. 20.True or false: a transistor glows using little power. (a) False (b) True
  21. 21.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  22. 22.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) fuse (d) resistor
  23. 23.True or false: a thermistor makes a beeping sound. (a) True (b) False
  24. 24.What does a fuse do? (a) senses how hot it is (b) turns a fan or wheels (c) beeps for an alarm (d) blows if current is high
  25. 25.🧩 Which component lets current go one way? (a) transistor (b) diode (c) capacitor (d) thermistor
  26. 26.🧩 Which component glows using little power? (a) LED (b) LDR (c) resistor (d) capacitor
  27. 27.What does a capacitor do? (a) boosts a small signal (b) stores a little charge (c) beeps for an alarm (d) senses how bright it is
  28. 28.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) smooths a wobbly supply (d) is a resistance knob
  29. 29.What does an LED do? (a) has coloured bands (b) glows using little power (c) senses how hot it is (d) turns a fan or wheels
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  31. 31.True or false: a buzzer beeps for an alarm. (a) False (b) True
  32. 32.True or false: a motor turns a fan or wheels. (a) True (b) False
  33. 33.True or false: a thermistor senses how hot it is. (a) True (b) False
  34. 34.True or false: a potentiometer stores a little charge. (a) True (b) False
  35. 35.True or false: a diode beeps for an alarm. (a) False (b) True
  36. 36.🧩 Which component senses how hot it is? (a) capacitor (b) transistor (c) thermistor (d) buzzer
  37. 37.What does a resistor do? (a) turns a fan or wheels (b) has coloured bands (c) smooths a wobbly supply (d) senses how bright it is
  38. 38.What does a resistor do? (a) limits the current (b) senses how hot it is (c) smooths a wobbly supply (d) lets current go one way
  39. 39.What does a potentiometer do? (a) stores a little charge (b) is a resistance knob (c) makes things spin (d) has coloured bands
  40. 40.True or false: a capacitor stores a little charge. (a) True (b) False

Answer key

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

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