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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 135 · 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.What does a capacitor do? (a) blows if current is high (b) has coloured bands (c) stores a little charge (d) glows using little power
  2. 2.True or false: a thermistor limits the current. (a) True (b) False
  3. 3.🧩 Which component glows using little power? (a) potentiometer (b) diode (c) motor (d) LED
  4. 4.🧩 Which component lets current go one way? (a) fuse (b) diode (c) capacitor (d) LDR
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
  6. 6.🧩 Which component turns a fan or wheels? (a) diode (b) thermistor (c) LED (d) motor
  7. 7.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  8. 8.True or false: a diode has coloured bands. (a) True (b) False
  9. 9.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) boosts a small signal (d) glows using little power
  10. 10.🧩 Which component is a resistance knob? (a) transistor (b) buzzer (c) resistor (d) potentiometer
  11. 11.True or false: a transistor makes a beeping sound. (a) False (b) True
  12. 12.True or false: a fuse blows if current is high. (a) True (b) False
  13. 13.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  14. 14.What does a buzzer do? (a) beeps for an alarm (b) has coloured bands (c) lets current go one way (d) smooths a wobbly supply
  15. 15.True or false: an LED glows using little power. (a) False (b) True
  16. 16.True or false: a motor turns a fan or wheels. (a) False (b) True
  17. 17.What does a diode do? (a) senses how hot it is (b) lets current go one way (c) senses how bright it is (d) boosts a small signal
  18. 18.🧩 Which component makes things spin? (a) LDR (b) thermistor (c) motor (d) potentiometer
  19. 19.What does a thermistor do? (a) turns a fan or wheels (b) senses how bright it is (c) limits the current (d) senses how hot it is
  20. 20.What does a buzzer do? (a) has coloured bands (b) limits the current (c) makes a beeping sound (d) stores a little charge
  21. 21.🧩 Which component limits the current? (a) fuse (b) resistor (c) buzzer (d) LED
  22. 22.What does a fuse do? (a) senses how hot it is (b) beeps for an alarm (c) makes a beeping sound (d) blows if current is high
  23. 23.What does an LED do? (a) has coloured bands (b) senses how hot it is (c) smooths a wobbly supply (d) glows using little power
  24. 24.What does a transistor do? (a) stores a little charge (b) senses how hot it is (c) boosts a small signal (d) senses how bright it is
  25. 25.True or false: a resistor makes things spin. (a) True (b) False
  26. 26.What does a capacitor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) glows using little power (d) turns a fan or wheels
  27. 27.What does a resistor do? (a) senses how hot it is (b) makes things spin (c) limits the current (d) senses how bright it is
  28. 28.🧩 Which component makes a beeping sound? (a) capacitor (b) resistor (c) buzzer (d) LED
  29. 29.True or false: a resistor blows if current is high. (a) True (b) False
  30. 30.True or false: a thermistor senses how hot it is. (a) False (b) True
  31. 31.🧩 Which component blows if current is high? (a) potentiometer (b) resistor (c) fuse (d) diode
  32. 32.🧩 Which component has coloured bands? (a) thermistor (b) transistor (c) resistor (d) LED
  33. 33.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
  34. 34.🧩 Which component stores a little charge? (a) transistor (b) resistor (c) capacitor (d) motor
  35. 35.True or false: a resistor limits the current. (a) False (b) True
  36. 36.🧩 Which component smooths a wobbly supply? (a) fuse (b) capacitor (c) motor (d) LDR
  37. 37.🧩 Which component boosts a small signal? (a) capacitor (b) diode (c) transistor (d) potentiometer
  38. 38.What does a potentiometer do? (a) has coloured bands (b) is a resistance knob (c) lets current go one way (d) makes things spin
  39. 39.True or false: a thermistor glows using little power. (a) True (b) False
  40. 40.🧩 Which component senses how bright it is? (a) transistor (b) motor (c) capacitor (d) LDR

Answer key

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

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