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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 55 · 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.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  2. 2.🧩 Which component senses how bright it is? (a) potentiometer (b) diode (c) LDR (d) thermistor
  3. 3.🧩 Which component blows if current is high? (a) motor (b) buzzer (c) fuse (d) transistor
  4. 4.🧩 Which component glows using little power? (a) LED (b) diode (c) LDR (d) buzzer
  5. 5.What does a diode do? (a) boosts a small signal (b) lets current go one way (c) is a resistance knob (d) beeps for an alarm
  6. 6.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
  7. 7.What does an LDR do? (a) is a resistance knob (b) blows if current is high (c) beeps for an alarm (d) senses how bright it is
  8. 8.True or false: an LDR boosts a small signal. (a) False (b) True
  9. 9.🧩 Which component senses how hot it is? (a) thermistor (b) capacitor (c) potentiometer (d) diode
  10. 10.What does a fuse do? (a) smooths a wobbly supply (b) lets current go one way (c) blows if current is high (d) has coloured bands
  11. 11.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  12. 12.What does an LED do? (a) lets current go one way (b) boosts a small signal (c) has coloured bands (d) glows using little power
  13. 13.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) has coloured bands (d) makes a beeping sound
  14. 14.What does a potentiometer do? (a) smooths a wobbly supply (b) stores a little charge (c) senses how hot it is (d) is a resistance knob
  15. 15.🧩 Which component has coloured bands? (a) resistor (b) fuse (c) diode (d) capacitor
  16. 16.True or false: a thermistor makes things spin. (a) True (b) False
  17. 17.True or false: an LED glows using little power. (a) True (b) False
  18. 18.What does a motor do? (a) limits the current (b) has coloured bands (c) makes things spin (d) boosts a small signal
  19. 19.🧩 Which component stores a little charge? (a) thermistor (b) diode (c) potentiometer (d) capacitor
  20. 20.True or false: a transistor has coloured bands. (a) False (b) True
  21. 21.True or false: a resistor has coloured bands. (a) False (b) True
  22. 22.True or false: a capacitor stores a little charge. (a) False (b) True
  23. 23.🧩 Which component is a resistance knob? (a) motor (b) transistor (c) buzzer (d) potentiometer
  24. 24.True or false: a buzzer beeps for an alarm. (a) True (b) False
  25. 25.🧩 Which component makes a beeping sound? (a) motor (b) LDR (c) resistor (d) buzzer
  26. 26.True or false: a transistor boosts a small signal. (a) False (b) True
  27. 27.True or false: a buzzer makes a beeping sound. (a) True (b) False
  28. 28.🧩 Which component lets current go one way? (a) transistor (b) motor (c) buzzer (d) diode
  29. 29.🧩 Which component limits the current? (a) resistor (b) fuse (c) LDR (d) transistor
  30. 30.True or false: an LDR senses how bright it is. (a) False (b) True
  31. 31.True or false: a transistor limits the current. (a) False (b) True
  32. 32.What does a buzzer do? (a) limits the current (b) makes a beeping sound (c) stores a little charge (d) makes things spin
  33. 33.True or false: a motor beeps for an alarm. (a) False (b) True
  34. 34.True or false: a motor blows if current is high. (a) True (b) False
  35. 35.True or false: a diode glows using little power. (a) True (b) False
  36. 36.True or false: a potentiometer is a resistance knob. (a) False (b) True
  37. 37.True or false: a diode beeps for an alarm. (a) True (b) False
  38. 38.What does a transistor do? (a) beeps for an alarm (b) boosts a small signal (c) stores a little charge (d) makes a beeping sound
  39. 39.True or false: a capacitor is a resistance knob. (a) False (b) True
  40. 40.🧩 Which component makes things spin? (a) diode (b) capacitor (c) motor (d) LED

Answer key

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

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