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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 431 · 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 motor makes things spin. (a) True (b) False
  2. 2.🧩 Which component lets current go one way? (a) diode (b) buzzer (c) LDR (d) LED
  3. 3.🧩 Which component is a resistance knob? (a) motor (b) fuse (c) resistor (d) potentiometer
  4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  5. 5.True or false: a potentiometer makes things spin. (a) False (b) True
  6. 6.What does a fuse do? (a) boosts a small signal (b) makes a beeping sound (c) blows if current is high (d) smooths a wobbly supply
  7. 7.🧩 Which component limits the current? (a) buzzer (b) resistor (c) transistor (d) potentiometer
  8. 8.True or false: a potentiometer makes a beeping sound. (a) True (b) False
  9. 9.🧩 Which component turns a fan or wheels? (a) transistor (b) resistor (c) motor (d) LDR
  10. 10.What does an LDR do? (a) is a resistance knob (b) makes things spin (c) beeps for an alarm (d) senses how bright it is
  11. 11.🧩 Which component makes things spin? (a) LED (b) diode (c) buzzer (d) motor
  12. 12.What does a resistor do? (a) makes things spin (b) boosts a small signal (c) limits the current (d) lets current go one way
  13. 13.🧩 Which component blows if current is high? (a) LED (b) fuse (c) diode (d) resistor
  14. 14.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  15. 15.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
  16. 16.What does a transistor do? (a) lets current go one way (b) beeps for an alarm (c) boosts a small signal (d) glows using little power
  17. 17.What does a motor do? (a) makes a beeping sound (b) turns a fan or wheels (c) beeps for an alarm (d) senses how hot it is
  18. 18.🧩 Which component glows using little power? (a) potentiometer (b) motor (c) transistor (d) LED
  19. 19.What does a buzzer do? (a) senses how bright it is (b) lets current go one way (c) senses how hot it is (d) beeps for an alarm
  20. 20.True or false: a potentiometer senses how bright it is. (a) False (b) True
  21. 21.🧩 Which component has coloured bands? (a) capacitor (b) resistor (c) motor (d) LDR
  22. 22.True or false: a capacitor is a resistance knob. (a) True (b) False
  23. 23.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  24. 24.🧩 Which component senses how hot it is? (a) diode (b) thermistor (c) capacitor (d) resistor
  25. 25.True or false: a motor stores a little charge. (a) True (b) False
  26. 26.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) LED (d) resistor
  27. 27.True or false: an LED glows using little power. (a) True (b) False
  28. 28.True or false: a motor senses how hot it is. (a) False (b) True
  29. 29.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) LED (d) LDR
  30. 30.What does a motor do? (a) senses how bright it is (b) lets current go one way (c) blows if current is high (d) makes things spin
  31. 31.What does a thermistor do? (a) senses how bright it is (b) has coloured bands (c) senses how hot it is (d) glows using little power
  32. 32.What does a diode do? (a) limits the current (b) blows if current is high (c) lets current go one way (d) beeps for an alarm
  33. 33.🧩 Which component boosts a small signal? (a) LDR (b) motor (c) transistor (d) resistor
  34. 34.True or false: a potentiometer beeps for an alarm. (a) True (b) False
  35. 35.True or false: a resistor stores a little charge. (a) False (b) True
  36. 36.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) potentiometer (d) thermistor
  37. 37.True or false: a motor glows using little power. (a) False (b) True
  38. 38.What does a buzzer do? (a) lets current go one way (b) senses how bright it is (c) makes a beeping sound (d) smooths a wobbly supply
  39. 39.True or false: a buzzer makes a beeping sound. (a) True (b) False
  40. 40.True or false: a transistor glows using little power. (a) False (b) True

Answer key

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

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