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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 381 · 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 part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  2. 2.What does a potentiometer do? (a) is a resistance knob (b) boosts a small signal (c) lets current go one way (d) turns a fan or wheels
  3. 3.🧩 Which component blows if current is high? (a) capacitor (b) thermistor (c) fuse (d) transistor
  4. 4.What does a fuse do? (a) is a resistance knob (b) blows if current is high (c) senses how bright it is (d) turns a fan or wheels
  5. 5.🧩 Which component has coloured bands? (a) thermistor (b) LDR (c) capacitor (d) resistor
  6. 6.🧩 Which component boosts a small signal? (a) diode (b) capacitor (c) LED (d) transistor
  7. 7.🧩 Which component lets current go one way? (a) transistor (b) motor (c) diode (d) buzzer
  8. 8.True or false: a capacitor senses how hot it is. (a) False (b) True
  9. 9.True or false: an LDR is a resistance knob. (a) True (b) False
  10. 10.🧩 Which component senses how bright it is? (a) buzzer (b) LED (c) transistor (d) LDR
  11. 11.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) capacitor (d) motor
  12. 12.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  13. 13.True or false: a fuse limits the current. (a) True (b) False
  14. 14.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  15. 15.What does a transistor do? (a) beeps for an alarm (b) senses how bright it is (c) glows using little power (d) boosts a small signal
  16. 16.What does a capacitor do? (a) smooths a wobbly supply (b) glows using little power (c) blows if current is high (d) lets current go one way
  17. 17.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  18. 18.🧩 Which component turns a fan or wheels? (a) potentiometer (b) thermistor (c) LDR (d) motor
  19. 19.True or false: a diode lets current go one way. (a) False (b) True
  20. 20.What does a diode do? (a) makes things spin (b) has coloured bands (c) lets current go one way (d) beeps for an alarm
  21. 21.🧩 Which component stores a little charge? (a) fuse (b) thermistor (c) capacitor (d) LED
  22. 22.True or false: a resistor limits the current. (a) False (b) True
  23. 23.What does a thermistor do? (a) boosts a small signal (b) is a resistance knob (c) senses how hot it is (d) turns a fan or wheels
  24. 24.What does a motor do? (a) beeps for an alarm (b) blows if current is high (c) boosts a small signal (d) makes things spin
  25. 25.True or false: a buzzer limits the current. (a) True (b) False
  26. 26.🧩 Which component senses how hot it is? (a) potentiometer (b) capacitor (c) thermistor (d) resistor
  27. 27.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
  28. 28.True or false: a diode blows if current is high. (a) True (b) False
  29. 29.🧩 Which component glows using little power? (a) LDR (b) thermistor (c) LED (d) transistor
  30. 30.🧩 Which component limits the current? (a) buzzer (b) resistor (c) diode (d) potentiometer
  31. 31.What does an LED do? (a) smooths a wobbly supply (b) senses how hot it is (c) lets current go one way (d) glows using little power
  32. 32.True or false: a resistor makes a beeping sound. (a) False (b) True
  33. 33.True or false: an LED senses how hot it is. (a) True (b) False
  34. 34.🧩 Which component makes a beeping sound? (a) motor (b) diode (c) capacitor (d) buzzer
  35. 35.True or false: a thermistor makes a beeping sound. (a) False (b) True
  36. 36.True or false: a resistor stores a little charge. (a) True (b) False
  37. 37.What does a buzzer do? (a) limits the current (b) boosts a small signal (c) makes a beeping sound (d) is a resistance knob
  38. 38.What does a resistor do? (a) makes things spin (b) has coloured bands (c) senses how bright it is (d) smooths a wobbly supply
  39. 39.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) resistor (d) thermistor
  40. 40.🧩 Which component makes things spin? (a) LED (b) potentiometer (c) motor (d) capacitor

Answer key

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

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