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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 695 · 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 makes things spin? (a) motor (b) capacitor (c) diode (d) potentiometer
  2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  3. 3.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) buzzer (d) LED
  4. 4.True or false: a buzzer boosts a small signal. (a) False (b) True
  5. 5.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) fuse (d) LDR
  6. 6.What does an LDR do? (a) senses how bright it is (b) lets current go one way (c) makes things spin (d) makes a beeping sound
  7. 7.🧩 Which component lets current go one way? (a) thermistor (b) potentiometer (c) diode (d) motor
  8. 8.True or false: a resistor limits the current. (a) True (b) False
  9. 9.True or false: a resistor boosts a small signal. (a) False (b) True
  10. 10.True or false: a potentiometer glows using little power. (a) True (b) False
  11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  12. 12.True or false: a diode senses how bright it is. (a) True (b) False
  13. 13.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  14. 14.True or false: a resistor has coloured bands. (a) False (b) True
  15. 15.True or false: an LED stores a little charge. (a) False (b) True
  16. 16.What does a diode do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) stores a little charge (d) lets current go one way
  17. 17.🧩 Which component beeps for an alarm? (a) LDR (b) potentiometer (c) transistor (d) buzzer
  18. 18.🧩 Which component senses how hot it is? (a) transistor (b) resistor (c) thermistor (d) motor
  19. 19.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) thermistor (d) buzzer
  20. 20.What does a transistor do? (a) boosts a small signal (b) stores a little charge (c) turns a fan or wheels (d) glows using little power
  21. 21.What does a fuse do? (a) limits the current (b) makes things spin (c) lets current go one way (d) blows if current is high
  22. 22.What does a motor do? (a) makes things spin (b) senses how hot it is (c) smooths a wobbly supply (d) boosts a small signal
  23. 23.What does a capacitor do? (a) beeps for an alarm (b) makes things spin (c) stores a little charge (d) lets current go one way
  24. 24.True or false: a capacitor stores a little charge. (a) False (b) True
  25. 25.What does a buzzer do? (a) beeps for an alarm (b) is a resistance knob (c) limits the current (d) stores a little charge
  26. 26.🧩 Which component makes a beeping sound? (a) LDR (b) diode (c) buzzer (d) transistor
  27. 27.🧩 Which component turns a fan or wheels? (a) diode (b) LDR (c) LED (d) motor
  28. 28.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) thermistor (d) resistor
  29. 29.True or false: a fuse blows if current is high. (a) True (b) False
  30. 30.True or false: an LED glows using little power. (a) False (b) True
  31. 31.True or false: a potentiometer makes things spin. (a) False (b) True
  32. 32.What does a potentiometer do? (a) senses how bright it is (b) glows using little power (c) turns a fan or wheels (d) is a resistance knob
  33. 33.True or false: a potentiometer senses how bright it is. (a) False (b) True
  34. 34.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) diode (d) resistor
  35. 35.What does a thermistor do? (a) blows if current is high (b) makes things spin (c) senses how hot it is (d) stores a little charge
  36. 36.True or false: a buzzer makes a beeping sound. (a) True (b) False
  37. 37.True or false: an LED senses how bright it is. (a) False (b) True
  38. 38.🧩 Which component glows using little power? (a) resistor (b) fuse (c) LED (d) motor
  39. 39.🧩 Which component boosts a small signal? (a) fuse (b) potentiometer (c) transistor (d) diode
  40. 40.🧩 Which component limits the current? (a) LDR (b) resistor (c) motor (d) fuse

Answer key

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

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