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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 240 · 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 a beeping sound? (a) buzzer (b) LDR (c) resistor (d) LED
  2. 2.🧩 Which component turns a fan or wheels? (a) diode (b) thermistor (c) potentiometer (d) motor
  3. 3.True or false: a buzzer stores a little charge. (a) True (b) False
  4. 4.What does an LDR do? (a) beeps for an alarm (b) lets current go one way (c) senses how bright it is (d) glows using little power
  5. 5.What does a thermistor do? (a) is a resistance knob (b) has coloured bands (c) senses how hot it is (d) boosts a small signal
  6. 6.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  7. 7.True or false: an LED smooths a wobbly supply. (a) True (b) False
  8. 8.🧩 Which component makes things spin? (a) thermistor (b) resistor (c) motor (d) potentiometer
  9. 9.🧩 Which component senses how bright it is? (a) resistor (b) motor (c) diode (d) LDR
  10. 10.True or false: a resistor has coloured bands. (a) True (b) False
  11. 11.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) makes a beeping sound (d) limits the current
  12. 12.True or false: a resistor limits the current. (a) False (b) True
  13. 13.What does a transistor do? (a) stores a little charge (b) glows using little power (c) is a resistance knob (d) boosts a small signal
  14. 14.What does a fuse do? (a) blows if current is high (b) smooths a wobbly supply (c) stores a little charge (d) boosts a small signal
  15. 15.🧩 Which component limits the current? (a) thermistor (b) LDR (c) diode (d) resistor
  16. 16.🧩 Which component lets current go one way? (a) LDR (b) LED (c) potentiometer (d) diode
  17. 17.🧩 Which component boosts a small signal? (a) potentiometer (b) fuse (c) motor (d) transistor
  18. 18.True or false: an LDR glows using little power. (a) True (b) False
  19. 19.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  20. 20.What does a potentiometer do? (a) lets current go one way (b) glows using little power (c) makes things spin (d) is a resistance knob
  21. 21.What does an LED do? (a) stores a little charge (b) makes things spin (c) senses how bright it is (d) glows using little power
  22. 22.True or false: a capacitor glows using little power. (a) True (b) False
  23. 23.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) motor (d) diode
  24. 24.🧩 Which component glows using little power? (a) LED (b) potentiometer (c) resistor (d) buzzer
  25. 25.True or false: an LDR senses how bright it is. (a) False (b) True
  26. 26.True or false: an LED boosts a small signal. (a) True (b) False
  27. 27.What does a resistor do? (a) lets current go one way (b) senses how bright it is (c) blows if current is high (d) limits the current
  28. 28.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) LED (d) LDR
  29. 29.True or false: a capacitor stores a little charge. (a) False (b) True
  30. 30.True or false: a motor boosts a small signal. (a) True (b) False
  31. 31.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  32. 32.What does a buzzer do? (a) glows using little power (b) makes a beeping sound (c) makes things spin (d) has coloured bands
  33. 33.True or false: a thermistor senses how bright it is. (a) False (b) True
  34. 34.True or false: a resistor makes a beeping sound. (a) True (b) False
  35. 35.🧩 Which component blows if current is high? (a) fuse (b) thermistor (c) resistor (d) LED
  36. 36.True or false: a buzzer blows if current is high. (a) False (b) True
  37. 37.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) buzzer (d) motor
  38. 38.What does a motor do? (a) makes things spin (b) limits the current (c) boosts a small signal (d) has coloured bands
  39. 39.🧩 Which component stores a little charge? (a) resistor (b) capacitor (c) buzzer (d) LED
  40. 40.True or false: a fuse blows if current is high. (a) False (b) True

Answer key

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

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