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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 560 · 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 limits the current? (a) LDR (b) fuse (c) resistor (d) motor
  2. 2.What does a potentiometer do? (a) makes a beeping sound (b) stores a little charge (c) has coloured bands (d) is a resistance knob
  3. 3.True or false: a transistor stores a little charge. (a) True (b) False
  4. 4.True or false: a thermistor senses how hot it is. (a) False (b) True
  5. 5.True or false: a buzzer has coloured bands. (a) False (b) True
  6. 6.What does a transistor do? (a) blows if current is high (b) smooths a wobbly supply (c) glows using little power (d) boosts a small signal
  7. 7.True or false: a transistor boosts a small signal. (a) False (b) True
  8. 8.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) LDR (d) capacitor
  9. 9.True or false: a thermistor stores a little charge. (a) False (b) True
  10. 10.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
  11. 11.True or false: a capacitor beeps for an alarm. (a) True (b) False
  12. 12.🧩 Which component blows if current is high? (a) LED (b) diode (c) fuse (d) resistor
  13. 13.What does a motor do? (a) has coloured bands (b) senses how bright it is (c) makes things spin (d) smooths a wobbly supply
  14. 14.🧩 Which component beeps for an alarm? (a) motor (b) capacitor (c) transistor (d) buzzer
  15. 15.True or false: a diode lets current go one way. (a) True (b) False
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  17. 17.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
  18. 18.True or false: a potentiometer is a resistance knob. (a) True (b) False
  19. 19.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
  20. 20.What does a capacitor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) senses how hot it is (d) blows if current is high
  21. 21.🧩 Which component smooths a wobbly supply? (a) LED (b) diode (c) LDR (d) capacitor
  22. 22.True or false: a resistor has coloured bands. (a) True (b) False
  23. 23.🧩 Which component is a resistance knob? (a) fuse (b) transistor (c) potentiometer (d) buzzer
  24. 24.🧩 Which component makes a beeping sound? (a) buzzer (b) diode (c) thermistor (d) fuse
  25. 25.What does a resistor do? (a) has coloured bands (b) senses how hot it is (c) turns a fan or wheels (d) smooths a wobbly supply
  26. 26.What does an LDR do? (a) makes a beeping sound (b) makes things spin (c) limits the current (d) senses how bright it is
  27. 27.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) LDR (d) buzzer
  28. 28.🧩 Which component glows using little power? (a) potentiometer (b) LDR (c) LED (d) fuse
  29. 29.What does a thermistor do? (a) has coloured bands (b) senses how hot it is (c) stores a little charge (d) turns a fan or wheels
  30. 30.What does a capacitor do? (a) makes things spin (b) senses how bright it is (c) stores a little charge (d) boosts a small signal
  31. 31.🧩 Which component has coloured bands? (a) thermistor (b) motor (c) LED (d) resistor
  32. 32.🧩 Which component stores a little charge? (a) LED (b) motor (c) resistor (d) capacitor
  33. 33.True or false: a buzzer makes things spin. (a) True (b) False
  34. 34.What does a fuse do? (a) turns a fan or wheels (b) senses how hot it is (c) smooths a wobbly supply (d) blows if current is high
  35. 35.What does a resistor do? (a) blows if current is high (b) stores a little charge (c) limits the current (d) lets current go one way
  36. 36.True or false: a thermistor lets current go one way. (a) False (b) True
  37. 37.🧩 Which component boosts a small signal? (a) diode (b) potentiometer (c) transistor (d) thermistor
  38. 38.True or false: a motor makes a beeping sound. (a) False (b) True
  39. 39.True or false: a resistor limits the current. (a) False (b) True
  40. 40.What does a motor do? (a) turns a fan or wheels (b) senses how hot it is (c) limits the current (d) boosts a small signal

Answer key

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

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