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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 482 · 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 smooths a wobbly supply? (a) LDR (b) transistor (c) capacitor (d) resistor
  2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  3. 3.🧩 Which component is a resistance knob? (a) LDR (b) transistor (c) diode (d) potentiometer
  4. 4.What does a resistor do? (a) boosts a small signal (b) lets current go one way (c) has coloured bands (d) is a resistance knob
  5. 5.What does a buzzer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) beeps for an alarm (d) lets current go one way
  6. 6.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  7. 7.🧩 Which component beeps for an alarm? (a) LED (b) diode (c) buzzer (d) fuse
  8. 8.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) potentiometer (d) LED
  9. 9.🧩 Which component stores a little charge? (a) motor (b) potentiometer (c) fuse (d) capacitor
  10. 10.🧩 Which component turns a fan or wheels? (a) motor (b) potentiometer (c) LED (d) buzzer
  11. 11.True or false: a diode makes things spin. (a) True (b) False
  12. 12.True or false: a thermistor senses how hot it is. (a) False (b) True
  13. 13.What does a motor do? (a) turns a fan or wheels (b) makes a beeping sound (c) senses how bright it is (d) senses how hot it is
  14. 14.What does a capacitor do? (a) senses how hot it is (b) boosts a small signal (c) smooths a wobbly supply (d) is a resistance knob
  15. 15.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
  16. 16.🧩 Which component blows if current is high? (a) diode (b) capacitor (c) fuse (d) LED
  17. 17.What does an LED do? (a) makes a beeping sound (b) beeps for an alarm (c) senses how bright it is (d) glows using little power
  18. 18.What does a capacitor do? (a) limits the current (b) stores a little charge (c) senses how bright it is (d) is a resistance knob
  19. 19.True or false: a resistor has coloured bands. (a) False (b) True
  20. 20.True or false: a buzzer beeps for an alarm. (a) False (b) True
  21. 21.🧩 Which component limits the current? (a) thermistor (b) resistor (c) motor (d) LED
  22. 22.True or false: a diode smooths a wobbly supply. (a) True (b) False
  23. 23.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  24. 24.True or false: a fuse limits the current. (a) True (b) False
  25. 25.What does a potentiometer do? (a) is a resistance knob (b) limits the current (c) glows using little power (d) beeps for an alarm
  26. 26.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) stores a little charge (d) beeps for an alarm
  27. 27.True or false: a resistor limits the current. (a) False (b) True
  28. 28.True or false: an LDR has coloured bands. (a) False (b) True
  29. 29.True or false: a fuse senses how bright it is. (a) False (b) True
  30. 30.🧩 Which component lets current go one way? (a) buzzer (b) capacitor (c) motor (d) diode
  31. 31.True or false: a buzzer is a resistance knob. (a) False (b) True
  32. 32.True or false: a thermistor blows if current is high. (a) False (b) True
  33. 33.True or false: a transistor boosts a small signal. (a) False (b) True
  34. 34.True or false: a fuse lets current go one way. (a) False (b) True
  35. 35.True or false: a buzzer lets current go one way. (a) False (b) True
  36. 36.True or false: a buzzer limits the current. (a) True (b) False
  37. 37.What does a fuse do? (a) stores a little charge (b) boosts a small signal (c) senses how bright it is (d) blows if current is high
  38. 38.True or false: a resistor lets current go one way. (a) True (b) False
  39. 39.True or false: a motor makes things spin. (a) False (b) True
  40. 40.True or false: a capacitor is a resistance knob. (a) False (b) True

Answer key

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

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