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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 368 · 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 component senses how hot it is? (a) diode (b) capacitor (c) thermistor (d) motor
  2. 2.🧩 Which component limits the current? (a) motor (b) buzzer (c) fuse (d) resistor
  3. 3.True or false: a buzzer limits the current. (a) False (b) True
  4. 4.🧩 Which component lets current go one way? (a) resistor (b) diode (c) fuse (d) LED
  5. 5.True or false: an LDR senses how bright it is. (a) False (b) True
  6. 6.True or false: an LED smooths a wobbly supply. (a) False (b) True
  7. 7.🧩 Which component senses how bright it is? (a) transistor (b) resistor (c) diode (d) LDR
  8. 8.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  9. 9.True or false: a transistor is a resistance knob. (a) False (b) True
  10. 10.What does a resistor do? (a) stores a little charge (b) smooths a wobbly supply (c) limits the current (d) turns a fan or wheels
  11. 11.🧩 Which component blows if current is high? (a) potentiometer (b) thermistor (c) LED (d) fuse
  12. 12.True or false: a buzzer makes a beeping sound. (a) False (b) True
  13. 13.What does an LDR do? (a) makes a beeping sound (b) stores a little charge (c) senses how bright it is (d) limits the current
  14. 14.True or false: an LDR stores a little charge. (a) True (b) False
  15. 15.What does a motor do? (a) senses how hot it is (b) makes things spin (c) makes a beeping sound (d) lets current go one way
  16. 16.🧩 Which component makes a beeping sound? (a) buzzer (b) LED (c) LDR (d) diode
  17. 17.🧩 Which component boosts a small signal? (a) LED (b) fuse (c) transistor (d) potentiometer
  18. 18.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) lets current go one way (d) glows using little power
  19. 19.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) fuse (d) LDR
  20. 20.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
  21. 21.True or false: a resistor has coloured bands. (a) False (b) True
  22. 22.🧩 Which component has coloured bands? (a) thermistor (b) LED (c) buzzer (d) resistor
  23. 23.True or false: a thermistor senses how hot it is. (a) False (b) True
  24. 24.True or false: a transistor beeps for an alarm. (a) True (b) False
  25. 25.🧩 Which component makes things spin? (a) buzzer (b) thermistor (c) resistor (d) motor
  26. 26.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
  27. 27.True or false: a fuse lets current go one way. (a) False (b) True
  28. 28.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) has coloured bands (d) makes things spin
  29. 29.True or false: a thermistor glows using little power. (a) False (b) True
  30. 30.What does a transistor do? (a) senses how hot it is (b) turns a fan or wheels (c) makes things spin (d) boosts a small signal
  31. 31.True or false: a transistor turns a fan or wheels. (a) False (b) True
  32. 32.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) transistor (d) LDR
  33. 33.True or false: a transistor makes things spin. (a) True (b) False
  34. 34.What does a fuse do? (a) makes things spin (b) lets current go one way (c) turns a fan or wheels (d) blows if current is high
  35. 35.True or false: a diode lets current go one way. (a) False (b) True
  36. 36.True or false: a capacitor stores a little charge. (a) True (b) False
  37. 37.What does a motor do? (a) turns a fan or wheels (b) senses how bright it is (c) boosts a small signal (d) limits the current
  38. 38.What does a potentiometer do? (a) lets current go one way (b) smooths a wobbly supply (c) is a resistance knob (d) turns a fan or wheels
  39. 39.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  40. 40.🧩 Which component beeps for an alarm? (a) transistor (b) resistor (c) LDR (d) buzzer

Answer key

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

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