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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 383 · 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: an LED glows using little power. (a) False (b) True
  2. 2.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) LDR (d) capacitor
  3. 3.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
  4. 4.What does a diode do? (a) lets current go one way (b) limits the current (c) blows if current is high (d) beeps for an alarm
  5. 5.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  6. 6.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) buzzer (d) LED
  7. 7.True or false: a diode makes a beeping sound. (a) True (b) False
  8. 8.True or false: a capacitor blows if current is high. (a) True (b) False
  9. 9.What does a potentiometer do? (a) has coloured bands (b) senses how hot it is (c) stores a little charge (d) is a resistance knob
  10. 10.🧩 Which component blows if current is high? (a) LED (b) capacitor (c) fuse (d) diode
  11. 11.True or false: a transistor has coloured bands. (a) False (b) True
  12. 12.What does a buzzer do? (a) makes things spin (b) senses how hot it is (c) stores a little charge (d) beeps for an alarm
  13. 13.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) makes a beeping sound (d) lets current go one way
  14. 14.True or false: an LED senses how hot it is. (a) True (b) False
  15. 15.True or false: a buzzer beeps for an alarm. (a) False (b) True
  16. 16.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  17. 17.True or false: a thermistor glows using little power. (a) False (b) True
  18. 18.What does a fuse do? (a) senses how bright it is (b) blows if current is high (c) boosts a small signal (d) lets current go one way
  19. 19.🧩 Which component is a resistance knob? (a) LED (b) resistor (c) buzzer (d) potentiometer
  20. 20.True or false: a buzzer makes a beeping sound. (a) True (b) False
  21. 21.🧩 Which component limits the current? (a) capacitor (b) resistor (c) potentiometer (d) LDR
  22. 22.True or false: a diode glows using little power. (a) True (b) False
  23. 23.What does a transistor do? (a) is a resistance knob (b) boosts a small signal (c) glows using little power (d) senses how hot it is
  24. 24.True or false: a motor makes things spin. (a) True (b) False
  25. 25.True or false: a buzzer boosts a small signal. (a) True (b) False
  26. 26.True or false: a resistor glows using little power. (a) False (b) True
  27. 27.True or false: a resistor limits the current. (a) False (b) True
  28. 28.What does a thermistor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) senses how hot it is (d) turns a fan or wheels
  29. 29.What does an LDR do? (a) is a resistance knob (b) senses how hot it is (c) beeps for an alarm (d) senses how bright it is
  30. 30.🧩 Which component boosts a small signal? (a) potentiometer (b) resistor (c) diode (d) transistor
  31. 31.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) makes things spin (d) stores a little charge
  32. 32.🧩 Which component has coloured bands? (a) diode (b) capacitor (c) resistor (d) potentiometer
  33. 33.True or false: a capacitor turns a fan or wheels. (a) True (b) False
  34. 34.True or false: a resistor makes things spin. (a) False (b) True
  35. 35.🧩 Which component senses how hot it is? (a) buzzer (b) potentiometer (c) thermistor (d) resistor
  36. 36.True or false: a capacitor limits the current. (a) True (b) False
  37. 37.True or false: an LED makes things spin. (a) True (b) False
  38. 38.True or false: a potentiometer is a resistance knob. (a) False (b) True
  39. 39.True or false: a motor stores a little charge. (a) True (b) False
  40. 40.🧩 Which component senses how bright it is? (a) diode (b) LDR (c) fuse (d) motor

Answer key

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

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