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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 189 · 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 resistor (b) a capacitor (c) a buzzer (d) a diode
  2. 2.True or false: a thermistor limits the current. (a) True (b) False
  3. 3.What does a capacitor do? (a) limits the current (b) turns a fan or wheels (c) smooths a wobbly supply (d) senses how bright it is
  4. 4.What does a motor do? (a) smooths a wobbly supply (b) limits the current (c) makes things spin (d) makes a beeping sound
  5. 5.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  6. 6.What does a transistor do? (a) turns a fan or wheels (b) makes a beeping sound (c) lets current go one way (d) boosts a small signal
  7. 7.True or false: a diode lets current go one way. (a) True (b) False
  8. 8.🧩 Which component has coloured bands? (a) fuse (b) LED (c) motor (d) resistor
  9. 9.True or false: an LED turns a fan or wheels. (a) False (b) True
  10. 10.True or false: a transistor smooths a wobbly supply. (a) False (b) True
  11. 11.🧩 Which component smooths a wobbly supply? (a) diode (b) motor (c) capacitor (d) fuse
  12. 12.What does a diode do? (a) beeps for an alarm (b) blows if current is high (c) lets current go one way (d) limits the current
  13. 13.True or false: a transistor is a resistance knob. (a) True (b) False
  14. 14.What does a capacitor do? (a) turns a fan or wheels (b) makes a beeping sound (c) stores a little charge (d) lets current go one way
  15. 15.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) capacitor (d) buzzer
  16. 16.What does a resistor do? (a) has coloured bands (b) glows using little power (c) beeps for an alarm (d) stores a little charge
  17. 17.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) has coloured bands (d) makes a beeping sound
  18. 18.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) fuse (d) motor
  19. 19.What does a fuse do? (a) limits the current (b) glows using little power (c) blows if current is high (d) turns a fan or wheels
  20. 20.🧩 Which component makes a beeping sound? (a) buzzer (b) fuse (c) LED (d) potentiometer
  21. 21.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  22. 22.True or false: a resistor blows if current is high. (a) False (b) True
  23. 23.🧩 Which component blows if current is high? (a) diode (b) motor (c) transistor (d) fuse
  24. 24.🧩 Which component glows using little power? (a) resistor (b) buzzer (c) capacitor (d) LED
  25. 25.🧩 Which component turns a fan or wheels? (a) transistor (b) LDR (c) capacitor (d) motor
  26. 26.What does a thermistor do? (a) stores a little charge (b) lets current go one way (c) smooths a wobbly supply (d) senses how hot it is
  27. 27.🧩 Which component beeps for an alarm? (a) resistor (b) LDR (c) buzzer (d) potentiometer
  28. 28.🧩 Which component lets current go one way? (a) diode (b) resistor (c) motor (d) capacitor
  29. 29.🧩 Which component makes things spin? (a) LDR (b) LED (c) resistor (d) motor
  30. 30.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  31. 31.What does a potentiometer do? (a) makes a beeping sound (b) lets current go one way (c) is a resistance knob (d) blows if current is high
  32. 32.True or false: a potentiometer turns a fan or wheels. (a) False (b) True
  33. 33.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
  34. 34.What does a resistor do? (a) stores a little charge (b) limits the current (c) senses how hot it is (d) boosts a small signal
  35. 35.True or false: a capacitor blows if current is high. (a) False (b) True
  36. 36.True or false: a thermistor senses how hot it is. (a) True (b) False
  37. 37.True or false: a motor boosts a small signal. (a) False (b) True
  38. 38.🧩 Which component senses how bright it is? (a) LDR (b) capacitor (c) fuse (d) transistor
  39. 39.True or false: a motor makes things spin. (a) False (b) True
  40. 40.True or false: a transistor beeps for an alarm. (a) True (b) False

Answer key

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

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