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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 177 · 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 diode (b) a capacitor (c) a buzzer (d) a resistor
  2. 2.What does a fuse do? (a) beeps for an alarm (b) turns a fan or wheels (c) lets current go one way (d) blows if current is high
  3. 3.True or false: a fuse blows if current is high. (a) True (b) False
  4. 4.What does a capacitor do? (a) is a resistance knob (b) smooths a wobbly supply (c) senses how bright it is (d) has coloured bands
  5. 5.What does an LDR do? (a) boosts a small signal (b) glows using little power (c) is a resistance knob (d) senses how bright it is
  6. 6.True or false: a diode lets current go one way. (a) False (b) True
  7. 7.What does a motor do? (a) senses how bright it is (b) makes a beeping sound (c) turns a fan or wheels (d) stores a little charge
  8. 8.What does a resistor do? (a) senses how bright it is (b) turns a fan or wheels (c) has coloured bands (d) makes a beeping sound
  9. 9.🧩 Which component senses how bright it is? (a) fuse (b) resistor (c) LDR (d) potentiometer
  10. 10.True or false: a diode is a resistance knob. (a) True (b) False
  11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  12. 12.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) resistor (d) buzzer
  13. 13.True or false: an LED senses how bright it is. (a) True (b) False
  14. 14.🧩 Which component glows using little power? (a) resistor (b) thermistor (c) LED (d) LDR
  15. 15.What does a diode do? (a) is a resistance knob (b) makes things spin (c) lets current go one way (d) has coloured bands
  16. 16.What does a potentiometer do? (a) is a resistance knob (b) senses how bright it is (c) has coloured bands (d) glows using little power
  17. 17.🧩 Which component is a resistance knob? (a) transistor (b) potentiometer (c) buzzer (d) diode
  18. 18.What does a resistor do? (a) makes a beeping sound (b) boosts a small signal (c) blows if current is high (d) limits the current
  19. 19.True or false: a buzzer has coloured bands. (a) False (b) True
  20. 20.🧩 Which component limits the current? (a) LDR (b) diode (c) potentiometer (d) resistor
  21. 21.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) LDR (d) fuse
  22. 22.What does a buzzer do? (a) senses how bright it is (b) lets current go one way (c) is a resistance knob (d) beeps for an alarm
  23. 23.True or false: a thermistor senses how hot it is. (a) False (b) True
  24. 24.🧩 Which component has coloured bands? (a) diode (b) thermistor (c) capacitor (d) resistor
  25. 25.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
  26. 26.🧩 Which component lets current go one way? (a) resistor (b) buzzer (c) diode (d) potentiometer
  27. 27.🧩 Which component makes things spin? (a) fuse (b) potentiometer (c) motor (d) diode
  28. 28.True or false: a motor makes things spin. (a) False (b) True
  29. 29.What does a buzzer do? (a) is a resistance knob (b) has coloured bands (c) makes a beeping sound (d) blows if current is high
  30. 30.🧩 Which component stores a little charge? (a) thermistor (b) transistor (c) buzzer (d) capacitor
  31. 31.What does a capacitor do? (a) limits the current (b) stores a little charge (c) boosts a small signal (d) makes things spin
  32. 32.True or false: an LDR is a resistance knob. (a) False (b) True
  33. 33.True or false: a resistor is a resistance knob. (a) True (b) False
  34. 34.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) is a resistance knob (d) senses how hot it is
  35. 35.🧩 Which component turns a fan or wheels? (a) LED (b) transistor (c) motor (d) fuse
  36. 36.True or false: a buzzer makes a beeping sound. (a) False (b) True
  37. 37.True or false: a resistor limits the current. (a) False (b) True
  38. 38.True or false: an LDR senses how hot it is. (a) False (b) True
  39. 39.True or false: an LED glows using little power. (a) True (b) False
  40. 40.True or false: a capacitor smooths a wobbly supply. (a) False (b) True

Answer key

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

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