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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 273 · 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 resistor limits the current. (a) False (b) True
  2. 2.🧩 Which component makes things spin? (a) capacitor (b) motor (c) resistor (d) LDR
  3. 3.True or false: an LED glows using little power. (a) False (b) True
  4. 4.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) fuse (d) resistor
  5. 5.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  6. 6.What does a thermistor do? (a) beeps for an alarm (b) stores a little charge (c) senses how hot it is (d) limits the current
  7. 7.What does a diode do? (a) makes things spin (b) glows using little power (c) lets current go one way (d) beeps for an alarm
  8. 8.🧩 Which component blows if current is high? (a) motor (b) transistor (c) fuse (d) LDR
  9. 9.True or false: an LDR senses how bright it is. (a) False (b) True
  10. 10.True or false: a buzzer turns a fan or wheels. (a) False (b) True
  11. 11.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) fuse (d) resistor
  12. 12.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  13. 13.True or false: a potentiometer is a resistance knob. (a) True (b) False
  14. 14.What does an LDR do? (a) senses how hot it is (b) blows if current is high (c) senses how bright it is (d) makes things spin
  15. 15.True or false: an LDR has coloured bands. (a) True (b) False
  16. 16.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) turns a fan or wheels (d) makes a beeping sound
  17. 17.True or false: a capacitor has coloured bands. (a) False (b) True
  18. 18.True or false: an LDR makes a beeping sound. (a) False (b) True
  19. 19.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) an LED (d) a motor
  20. 20.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) buzzer (d) capacitor
  21. 21.🧩 Which component smooths a wobbly supply? (a) LDR (b) potentiometer (c) capacitor (d) motor
  22. 22.🧩 Which component has coloured bands? (a) motor (b) diode (c) resistor (d) thermistor
  23. 23.True or false: a potentiometer limits the current. (a) True (b) False
  24. 24.True or false: a capacitor blows if current is high. (a) True (b) False
  25. 25.🧩 Which component lets current go one way? (a) capacitor (b) resistor (c) transistor (d) diode
  26. 26.True or false: a motor turns a fan or wheels. (a) True (b) False
  27. 27.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  28. 28.🧩 Which component glows using little power? (a) diode (b) capacitor (c) transistor (d) LED
  29. 29.🧩 Which component senses how bright it is? (a) buzzer (b) thermistor (c) potentiometer (d) LDR
  30. 30.True or false: a diode boosts a small signal. (a) False (b) True
  31. 31.True or false: a fuse blows if current is high. (a) False (b) True
  32. 32.What does a fuse do? (a) smooths a wobbly supply (b) boosts a small signal (c) lets current go one way (d) blows if current is high
  33. 33.What does a buzzer do? (a) limits the current (b) blows if current is high (c) makes a beeping sound (d) makes things spin
  34. 34.What does a capacitor do? (a) boosts a small signal (b) senses how bright it is (c) smooths a wobbly supply (d) glows using little power
  35. 35.What does a transistor do? (a) is a resistance knob (b) turns a fan or wheels (c) boosts a small signal (d) smooths a wobbly supply
  36. 36.🧩 Which component senses how hot it is? (a) fuse (b) motor (c) resistor (d) thermistor
  37. 37.True or false: a capacitor makes a beeping sound. (a) False (b) True
  38. 38.🧩 Which component makes a beeping sound? (a) resistor (b) thermistor (c) buzzer (d) motor
  39. 39.What does a motor do? (a) stores a little charge (b) turns a fan or wheels (c) is a resistance knob (d) boosts a small signal
  40. 40.True or false: a thermistor turns a fan or wheels. (a) True (b) False

Answer key

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

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