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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 333 · 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) motor (b) capacitor (c) LDR (d) thermistor
  2. 2.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) stores a little charge (d) has coloured bands
  3. 3.True or false: a resistor limits the current. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  5. 5.True or false: a potentiometer is a resistance knob. (a) False (b) True
  6. 6.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  7. 7.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  8. 8.True or false: a motor makes a beeping sound. (a) True (b) False
  9. 9.What does an LDR do? (a) turns a fan or wheels (b) limits the current (c) blows if current is high (d) senses how bright it is
  10. 10.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) potentiometer (d) LED
  11. 11.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) is a resistance knob (d) senses how bright it is
  12. 12.True or false: a capacitor stores a little charge. (a) True (b) False
  13. 13.What does a motor do? (a) turns a fan or wheels (b) glows using little power (c) has coloured bands (d) limits the current
  14. 14.🧩 Which component turns a fan or wheels? (a) LDR (b) resistor (c) motor (d) transistor
  15. 15.True or false: a capacitor limits the current. (a) True (b) False
  16. 16.True or false: a fuse blows if current is high. (a) False (b) True
  17. 17.True or false: a resistor senses how hot it is. (a) True (b) False
  18. 18.True or false: a potentiometer senses how bright it is. (a) False (b) True
  19. 19.What does a diode do? (a) senses how hot it is (b) makes a beeping sound (c) turns a fan or wheels (d) lets current go one way
  20. 20.True or false: an LED limits the current. (a) False (b) True
  21. 21.What does a potentiometer do? (a) blows if current is high (b) senses how hot it is (c) is a resistance knob (d) senses how bright it is
  22. 22.True or false: a transistor boosts a small signal. (a) True (b) False
  23. 23.What does a buzzer do? (a) lets current go one way (b) beeps for an alarm (c) senses how hot it is (d) makes things spin
  24. 24.True or false: a diode lets current go one way. (a) False (b) True
  25. 25.True or false: a potentiometer stores a little charge. (a) False (b) True
  26. 26.🧩 Which component makes things spin? (a) LDR (b) resistor (c) motor (d) capacitor
  27. 27.🧩 Which component has coloured bands? (a) fuse (b) capacitor (c) resistor (d) LED
  28. 28.🧩 Which component makes a beeping sound? (a) capacitor (b) thermistor (c) resistor (d) buzzer
  29. 29.What does a capacitor do? (a) senses how bright it is (b) glows using little power (c) stores a little charge (d) blows if current is high
  30. 30.What does a capacitor do? (a) smooths a wobbly supply (b) blows if current is high (c) lets current go one way (d) makes things spin
  31. 31.True or false: a resistor has coloured bands. (a) False (b) True
  32. 32.🧩 Which component senses how bright it is? (a) transistor (b) resistor (c) LDR (d) capacitor
  33. 33.True or false: an LED makes things spin. (a) True (b) False
  34. 34.True or false: a transistor is a resistance knob. (a) True (b) False
  35. 35.🧩 Which component limits the current? (a) resistor (b) potentiometer (c) motor (d) diode
  36. 36.What does a transistor do? (a) is a resistance knob (b) boosts a small signal (c) beeps for an alarm (d) makes things spin
  37. 37.True or false: a transistor makes things spin. (a) True (b) False
  38. 38.True or false: a motor has coloured bands. (a) False (b) True
  39. 39.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) resistor (d) motor
  40. 40.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) LDR (d) diode

Answer key

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

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