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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 220 · 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) potentiometer (b) LED (c) thermistor (d) buzzer
  2. 2.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) boosts a small signal (d) senses how bright it is
  3. 3.True or false: a motor makes things spin. (a) False (b) True
  4. 4.What does a resistor do? (a) beeps for an alarm (b) boosts a small signal (c) is a resistance knob (d) limits the current
  5. 5.🧩 Which component blows if current is high? (a) capacitor (b) LED (c) LDR (d) fuse
  6. 6.True or false: a motor glows using little power. (a) False (b) True
  7. 7.True or false: a motor makes a beeping sound. (a) True (b) False
  8. 8.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) buzzer (d) LDR
  9. 9.What does a diode do? (a) is a resistance knob (b) lets current go one way (c) senses how bright it is (d) senses how hot it is
  10. 10.True or false: a transistor limits the current. (a) True (b) False
  11. 11.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) senses how hot it is (d) has coloured bands
  12. 12.True or false: a transistor boosts a small signal. (a) True (b) False
  13. 13.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  14. 14.🧩 Which component turns a fan or wheels? (a) LDR (b) LED (c) motor (d) resistor
  15. 15.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  16. 16.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
  17. 17.True or false: a potentiometer beeps for an alarm. (a) False (b) True
  18. 18.True or false: a motor turns a fan or wheels. (a) True (b) False
  19. 19.🧩 Which component makes things spin? (a) thermistor (b) resistor (c) LED (d) motor
  20. 20.What does a capacitor do? (a) senses how hot it is (b) stores a little charge (c) beeps for an alarm (d) makes things spin
  21. 21.🧩 Which component makes a beeping sound? (a) thermistor (b) transistor (c) capacitor (d) buzzer
  22. 22.True or false: a diode lets current go one way. (a) False (b) True
  23. 23.True or false: a fuse blows if current is high. (a) True (b) False
  24. 24.🧩 Which component smooths a wobbly supply? (a) fuse (b) capacitor (c) transistor (d) resistor
  25. 25.True or false: an LDR senses how bright it is. (a) True (b) False
  26. 26.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) LED (d) resistor
  27. 27.🧩 Which component limits the current? (a) resistor (b) LDR (c) buzzer (d) transistor
  28. 28.🧩 Which component glows using little power? (a) capacitor (b) thermistor (c) LED (d) buzzer
  29. 29.What does a buzzer do? (a) makes a beeping sound (b) is a resistance knob (c) makes things spin (d) lets current go one way
  30. 30.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) makes things spin (d) boosts a small signal
  31. 31.True or false: a transistor is a resistance knob. (a) False (b) True
  32. 32.🧩 Which component is a resistance knob? (a) buzzer (b) thermistor (c) potentiometer (d) capacitor
  33. 33.🧩 Which component boosts a small signal? (a) buzzer (b) transistor (c) resistor (d) fuse
  34. 34.What does a potentiometer do? (a) glows using little power (b) makes a beeping sound (c) makes things spin (d) is a resistance knob
  35. 35.What does a buzzer do? (a) stores a little charge (b) boosts a small signal (c) senses how bright it is (d) beeps for an alarm
  36. 36.What does a transistor do? (a) makes things spin (b) glows using little power (c) is a resistance knob (d) boosts a small signal
  37. 37.True or false: a resistor limits the current. (a) True (b) False
  38. 38.True or false: a fuse stores a little charge. (a) True (b) False
  39. 39.What does a motor do? (a) has coloured bands (b) lets current go one way (c) senses how bright it is (d) turns a fan or wheels
  40. 40.True or false: a capacitor stores a little charge. (a) True (b) False

Answer key

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

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